Suicide is an act of rebellion
Modern society is against suicide, because they want loyal wageslaves to produce goods and services for Chads and Stacies. They want you to be optimistic about the future; "things will get better," "you'll make it," "try hard and succeed." Then wham, you're 40-50 and your life is still shit and you wagecucked for Chad and Stacy for 20+ years. This is why suicides become high for the 40s-50s age group, because they realize life is ogre.
Suicide is simply dropping out of the system. My parents and society gave me a shit life. I simply don't want to live it. Society has propaganda tools like religion and optimism to keep you going and wagecucking till you're old. If all those wagecucks you see in retail stores and Amazon warehouses just decide to end their shit lives, it would be sorta of a rebellion. No more goods/services for Chad and Stacy. Society would have to restructure instead of just using propaganda to keep you going.