OP what you have said is very true. After thinking for very long periods of time, I realised that the "point", or "purpose" of life, is whatever we want it to be. Sometimes that may involve having children, or indulging in hedonism, or adhering to a religion etc... or a mix of multitudes of these factors
The reason why I continue to keep myself alive and put effort into life boils down to 4 fundamental reason:
1. Survival instinct that is hardwired into every human.
2. Curiosity. I want to know what it feels like to eat chocolate and have sex, drive cars, succeed academically, earn wages, travel, donate money to the poor etc... multiple times.
3. Killing myself would hurt loved ones.
4. Religious beliefs.
And overall I think this is what life and death boils down to for everyone, and why we keep ourselves alive and continue to reproduce. At least the top 3, if not the 4th reason will apply to almost everyone.