We rarely picture what the money, the space, or the time could have been instead.
I'm not weighing this against anything. I see the thing, and the thing is real and in front of me. An empty shelf or twenty saved dollars is invisible — it isn't a choice I can feel, so it doesn't count.
What looks like not caring about cost is usually the cost being invisible, not ignored. Making the trade-off gentle and concrete — "keeping this also means keeping the money" — can show a picture they genuinely couldn't see. As information, never as a scolding.