I can’t imagine, e.g. - going up to the cottage and bringing a console or handheld with me…
The idea of a vacation is to disconnect, no?
Probably the bigger takeaway for you is that everybody’s reason for vacationing is different — not everyone has access to a cottage for example.
If games help someone do that, it sounds fine to me. Just don't bring any F2P skinner box games.
Unless your vacation is to Las Vegas?
...and my whole family is the same :) We just grab some snacks and a light snack from a shop and hole up in different corners of the hotel room to just relax and unwind.
I generally don't play games on vacations, but travel time is an exception, and I sometimes carry a console just for that reason. The (3)DS is perfect for that: compact, robust, good battery life.
Then I can continue just by tapping the power button.