Sorry I voted you YABU but I meant to feel guilty about these things.
You know what works for your family and what you need.
I barely went on holiday as a kid and when we did my autistic parent would really struggle - they prefer to be at home or solo holidays.
I think I was lucky in that my friends never went on holiday much either. So it wasn’t so obvious. My kids are under holidayed compared with their friends but also house deposit was a priority for us too.
We are consciously trying to do more and have found the Eurostar worth the additional expenses with autistic kids. Honestly the state of the planet, you can feel smug not jetting off every year.
I know two decently privileged families who refuse air travel altogether and rarely go abroad and it’s not experienced / treated like a hardship but as something to be proud of. Reframe it as meeting your family’s needs too.
That said, I do like to expose my ASD kids to new things and push their comfort zone. But if money is tight or has different priorities, it’s hard to spend the money for a holiday on something that’s likely to be hard and not relaxing.
Your holidays might not work for this friend, but they don’t need to. They only need to work for your family.