Romantic love leads to sex meaning the chance of reproduction is much higher. If you love your children you'll be more likely to fight to protect them and care about what happens to them. A child with parents who love them has a higher chance of surviving and reproducing. Love for others also makes you likely to protect them which could increase their chance of reproducing which would help the species as a whole.

If thinking, imagining, and creating things isn't a big enough detriment to survival then there's no mechanism for lifeforms who do those things to be wiped out as a result of those traits. The same could go for love if not for the reasons I wrote above.

Being born with a 6th finger isn't beneficial to reproduction or survival, either, but apparently 1 in 500 babies are born with that mutation. Evolution doesn't make decisions, it does shit at random and whatever works sticks. Whatever doesn't work turns into dinner. If it makes no difference then it also sticks.

People trying to create life is much like people thinking they can control the climate; mother nature doesn't give a rat's ass what you think you can do and is way beyond our tiny monkey brains. And especially in the case of creating life, it's way out of our league anyway. It took millions of years to get this advanced, and while I don't know about the future, I'm not surprised we haven't figured it out in the past several thousand (really much less than that since we can't really count the years we didn't have the knowhow or tech for it).