i dont have any kids but i assume people who do have them for a ton of reasons. some just want to go raw, others are vain enough to just want to see a version of themselves, others want to have influence over someone, some think kids cement a relationship, and of course there are those who want to compete and outnumber other "tribes" so to speak, and of course you get the people who want to live vicariously through someone else. even an immortal will have some desire for a talent that they dont possess but their kids may.
until overcrowding happens, there is little aversion. you dont even have to take good care of the kids since nothing you do will get them killed.
Which is where government intervenes.