My point is orthogonal to "utility vs happiness". Let's say someone spends $5 on starbucks per day, I just want them to realize that's $1800 per year and so they're really making the choice between a coffee per day and an RTX 3090 every year. Or a $150 bottle of wine per month. Once you accept you are indeed making a choice, then you have the power to consciously choose what you want to splurge on.
But it's ignoring the human psychology involved. "Ignorance is bliss" is true. Yes ok, I could have invested in $GOOG and earned a bunch of money that would be worth more to me today, but that just isn't how we process information. What happens instead is that I buy the coffee because I want it and now I can't even enjoy it because I know it's "stupid."