Engaging children can be nourishing to the soul of those who enjoy it. But the calculus is definitely different from adults.

From a cold calculating standpoint, engaging an affluent adult can come with significant upsides: jobs, access to political power, commerce, international interface, mobility. An affluent adult can fuck you in a lot of ways, but you can also trade with them in ways that can really help you.

On the other hand, the relationship with children is asymmetric. A poor / minority child isn't going to offer you anything (from a selfish viewpoint), but neither is an affluent one. However an affluent family can absolutely crush you if they misinterpret some engagement with their children. The poor / minority family may be less likely to have the power to make a misunderstanding turn into a significant legal hassle for you. Therefore the calculus for engaging an affluent child look pretty bad, while that of engaging a poor child look more like neutral.

For adults I find it more of a wash, with the upsides typically higher than the downsides for engaging most any sane adult.