I was from the era of an outside loo, tin bath in front of the fire once a week ( Saturday, so we were clean for church), with top n tail washes in between.
Nowadays I have a bath every two or three days, and wash thoroughly in between. My bath is tiny, and it uses no more water than taking a shower. However I am now struggling to get out of it, and I really miss it and the way it reaches parts nothing else can reach.
When I see the ads on TV for the charity Water Aid, I am sure we are extravagant here in this country.
We managed in camp, Guides, D of E etc for a couple of days, and I think we could well cut back a bit on showers, so I agree with the OP.