> What makes you think that parent has the knowledge, ability, and time to do this task?

Okay, what about money? They also take donations.

> I see this "it's open source, make pull request" type of comment quite a lot but don't understand how you'd know if the person you're saying it to could do it. If not, it's kind of a dick move, isn't it?

No. Trying to make people feel bad for not wanting to work for free, is what I call a dick move.