You realize that there is a cost to making a cost-benefit analysis, but not sure if that cost is worth it (meta-cost-benefit analysis?).

Of course, though I still run into analysis paralysis for inconsequential choices like your example. Another thing to work on.

However, the choices I was referring to above are choices where my decision is overdetermined, and it's quite likely that I've already performed (a good approximation of) the cost-benefit calculation beforehand and only need to call the answer. I.e., I don't play MtG enough to justify spending $4 on another booster pack. The only reason to ignore this calculation would be to show that the approximation is bad in this case, i.e., do the calculation for this specific case. However, I end up neither doing the calculation or using the approximation to determine my decision.