Thanksgiving plans

Why are holidays so freaking hard to make plans for?
Multiple families, adult children, preferences, and schedules are so damn hard to make any definitive plans for. It is an irritating task every year, punctuated with the fact that trying to accommodate everyone is a real pain.
Why can’t it be more simple?
My parents & sibs, her parents and sibs, our children, their children…its chaos on the day but chaos and headaches leading up to it as well.
I think we’ve hear just about every excuse why something won’t work for somebody. Never can everyone ever cooperate with trying to make the plans or participate.
“I don’t like big groups.”
“We don’t know them that well and would be uncomfortable.”
“There is too much planning involved.”
“That isn’t our tradition.”
“We have to try to make it work for everyone so no one is left out.”
“I don’t want to do it that early.”
“There won’t be anything I can eat because of my diet.”
UGH!
It can’t just be, “We are doing lunch/dinner at XX:XX and if you would like to participate let us know. Here is what we are providing and here is what we still need: _________.”
No, that would be too easy.
It isn’t just this holiday either…Christmas, Easter, 4th of July…ugh.
Tiring. Irritating.
There is something to be said for being alone…just saying…