With someone who wants kids, your options are probably a relationship with kids in the plan, or a casual relationship of some sort since you're not what that person wants long term.

I guess the third option is try to have a serious relationship anyway and try to change their mind about the kid thing? Nothing unhealthy about that. /s

I love making fun of people as much as anyone, but why is your sarcasm directed at the person who was clear about what they wanted rather than the person who strangely matched in spite of that disconnect? Seems pretty reasonable to at least consider if someone matches with you knowing they are completely incompatible with what you want in a LTR, that they might have more casual interests. The other possibility is they didn't bother to read his bio. I'm sure that's what happened. Still on her in this case.

I guess it's also possible you submitted this hot take without completely reading what OP posted...