I agree. If it is for an expendable part like an inner tube/tire keep a spare, or two. I rationalize it by knowing I’ll need it eventually and have it on hand. Having 3+ would be hoarding. A meal at home instead of eating out and you’ve covered the cost. Already cheaper than a gym membership.
I suggest also investing in a quality floor pump. A little crying over the cost at purchase is made up by the ability to air up fast and get to enjoy riding.