@ YT, Truthsayer, whatever other retarded and oxymoronic alias you wish to use, and any friends you've invited to test the limits of our patience:
Taking all of an hour to research (might be sloppy as a result) I discovered several inventors that might make the world want to punch you in the face for that crack. And pretty much everything else you say on the average day.
George Edward Alcorn Jr. - Rocket scientist. Co-developed the radio frequency mass spectrometor amongst other spectral imaging devices.
Benjamin Banneker - Responsible for the Farmer's Almanac. If you're a farmer, you basically can't live without it.
Nathaniel Alexander - He invented the folding chair. (It's really the little things that just rock the world sometimes.)
Edmond Berger - Invented the spark plug, essential for combustion engines like those used in cars.
Bessie Blount Griffin - She designed the first medical feeding tubes allowing totally immobilized patients to feed themselves.
Otis Boykin - If it's an electronic device, chances are the variable electrical resistors he invented are inside it. He also patented a heart stimulation control unit and chemical air filters.
Marie Brown - Along with Sidney Jacoby she designed first home security system and smoke alarms.
Robert G. Bryant - NASA Scientist. Half the shit he does is classified, the other half is awesome. Such as the creasion of LaRC-SI thermoplastic.
George Washington Carver - The man literally did not do anything that wasn't awesome. On top of thousands of fix-it-yourself pointers, medicinal salves, and budget tightening strategies for poor white families in the states that would have been happy to slap chains on him like his parents, (his mother was taken by Confederate soldiers and his father's identity was thought to be a slave,) it is no exaggeration to say the entire American South owed it's agricultural survival in it's entirety to this man after decades of being a two-crop economy on depleted soil. By the way he turned down a six figure salary to continue a life dedicated to inventing things to help people in a non-profit manner.
Benjamin Carson - Neurosurgery pioneer. With 90+ published works and innumerable acheivements to his name he's pushed the field ahead considerably during his career.
David Crosthwait - He's the reason you can have a hot shower while living in a massive apartment complex.
Charles Drew - He isolated blood plasma for transfusions and started the Blood Bank. If you've ever undergone serious surgery, you just might owe this man your sorry life.
Philip Emeagwali - Nigerian computer engineer that designed the current record holder for most badass supercomputer in existence.
Meredith Gourdine - He's responsible for ElectroGasDynamics systems. From that he went on to invent the means to clear harmful smoke from a burning building, clear the fog from an airport runway, desalinize sea water, and use natural gas for electricity. He also won the silver medal for the long jump in the 1952 Summer Olympics.
Lloyd Augustus Hall - He invented food preservatives. Without him there would be no junk food. We frown on it now, but in his own time he was a godsend.
Frederick Jones - Prolific inventor, but best known for designing the first refrigeration unit for long-haul shipping trucks eliminating the risk of spoilage for perishable items like food.
Percy Julian - Synthesized cortisone for arthritis treatments and physostigmine for glacouma. Also made an extinguishing foam to combat oil fires.
Ernest Just - Cellular biologist. Advanced the field tremendously on a part-time basis. Repeat that: Ground breaking researcher employed only during summers but made more progress than every other full-time researcher combined.
Elijah McCoy - Prolific inventor and source of the phrase "The real McCoy" for the sheer quality of his inventions and adaptations. His most valued contribution was a mechanical lubricant.
Garret Morgan - Invented the gas mask and the traffic signal. In 1903 (invention of the automobile) the roads were chaos and accidents more likely than an eventless trip until his lights were implemented.
I could go on, boy could I ever, but I'll stop now and see if you're following me. They have three things in common: You can't imagine life without their contributions, they're black, and they are far more praise worthy than you will ever be in your life.
Now just try and justify YOUR pathetic existence to us