But not be willing to pay a few quid for all of them to sit together, yet expect other passengers to move in order for them to do so...
However, some stuff flight companies do are incredibly helpful (e. G. Allow us to board first) and make everyone 's experience better.
Unfortunately it's either that, or have no kids, or never fly (for some people this means: never meet your family again). All things that are limiting for a human being that should get a decent quality of life (culture and such)
That's a bit of a red herring to the conversation, and I'm a bit confused why that is the filter you choose to engage rather than policy for ensuring proper nutrition, UBI, or any other economic impact, or why my non-response intra-sentence to your comment online is a purity test for said support.
But taking a step back, even if parents are individually genetically biased towards their brood, that doesn't impact that part of a society's very essence and existence is to ensure children grow to adulthood. Eusociality and all that.
We could make things better, and it would require maybe not having your kids in particular at the front of the line. That doesn't mean society is absolutely thwarting your endeavor to be a good parent; it's a recognition that while children are important, they are not the only, nor the altogether and at all times, primary concern of civilization. I mean, if you want to define human nature solely by the effort to advance one's progeny... I mean, even then, you have to admit that the well-being and conceens of the adults who support that effort are also important. Evolution is the process of surviving the day, serially.