True, the Roman Empire fell and the United States could fall too. Humanity didn’t end though, it went through periods of enlightenment and darkness and kept marching forward.
I’m not saying the end of humanity is impossible, just that at many points in history it seemed like society was on the brink of total annihilation but yet here we still are.
In this case, corporations oppose MAID because sick and dying people need a lot of very expensive health care (skilled nursing, hospice care, etc) so they would much rather force them to stay alive in order to continue profiting off them.