If I can buy a cheap roof for $2k but have to replace it every year, or an expensive roof for $15k that will last 50 years, then LONG TERM the cheap roof is the more costly option.

But if I only have $2k instead of $15k, I'm not wrong to buy a cheap roof. Yelling at me about the long term costs of the cheap roof is missing the point. You're just saying that you're disappointed by my lack of $15k.