The opposite interpretation is that one is perpetually showering/tubbing in order to be in a state of relaxation. That is equally absurd.

You can turn back at any point.

That depends entirely on the situation. There are plenty of ways to climb, backpack, etc. where one has no choice but to continue. Less ridiculous climbing may involve social pressure to stay committed. Furthermore, all of these activities involve, as has been said elsewhere, real personal gain: strength, health, mental well-being, and real life experiences. Getting yourself chilly for five minutes in the morning is just playing around.