But they’re only practical and “life-skills” if you’re in really low income brackets. Even poor people who only eat at McDonald’s don’t need to bargain shop or cook. At a middle-class and above level, you don’t even have to clean.
I’d call “bargain shopping” a hobby but one that’s actually more of a middle class pursuit. The whole “I got this GREAT pair of designer shoes for 55% off its $225 ticket price!” thing.