Participating in a democracy, going to school, paying taxes, having a job… Hell, visiting a new country, going camping, climbing a boulder — all of these things involve discomfort and cover a spectrum of ‘mandatory’ to ‘100% chosen’.
‘Complaining’ is part of human discourse. Generally it’s acceptable to share the full range of day-to-day gripes, elation, full tragedies (e.g., deaths), and emotional heights with other humans.
You don’t want to hear constant griping about raising kids. I get that. I might not want to hear griping about national politics or Apple doing something or other. Cest le vie.
Your parents no doubt griped about raising you. You don’t have to have kids but someone has to! We’re going to gripe mate. No one is forcing you to listen.