I do agree with what you are saying, but there is a counter argument.
Not everyone can have the opportunities to bond "as a family unit" during their day to day lives, holidays are (supposed to be) a time when everyone can forget their day to day problems and relax, and have proper TIME to spend together and you really can bond as a family without all the stress you normally have.. it doesn't mean they live in misery the rest of the time, it's just that it isn't the same.
For instance me and DH work different shifts, our DD4 is at school, there isn't many opportunities for us to do things as a family unit, or much of anything without pressure to be doing something else (DD bedtime, activities, my work, his work, chores, caring, other commitments etc, just life basically!).. it's just how a lot of modern lives are now, and not exclusive to OP, sometimes you are pulled into different directions and while I do my upmost to dedicate time to family and DD & DH and I do prioritise it above most things as I love it, but it is quite hard to relax into it at times knowing I'm ignoring a mountain of shit to do it. DD wouldn't know the difference and we are always doing things together, but holidays are really where it is at for me, they are a special time, and that is why I never ever go abroad, I prefer lots of UK breaks through the year, rather than one big one.
If you read OPs posts, it sounds like she is constantly having to perform, to earn, to be everything to everyone, like many people, holidays are the one place she can let go of everything.. except PIL have now been invited and they apparently expect her to perform, which she obviously goes a long with for some reason?
I'd be putting my foot down though, if the in laws do fuck all to bond with them as a family in the day to day, and are only interested in helping her lazy DH and not her, they can get knotted if they think they are bringing their expectation of 'feminine energy(?!)' on holiday too! No idea why she isn't acknowledging that suggestion from most people here that she stops it in it's tracks, not to mention her own feelings on the matter.. it's really odd to go along with this.
The issue I have is that I am the one organizing the holiday, I am the one paying for it. I value our family time a lot, because we rarely get any.
I just really love our own family holidays, and we really get to bond as a family when we do go.
I just have a lot on my brain, work/breadwinner, child care, home administrator, holiday administrator, the expectations from PILs to have feminine energy hahah
They basically want me to be very well maintained, do all the housework, child care, cook for partner, work, and he sits back and relax...