A price tag gives unlike things a shared language without making them truly comparable.

Prices make everything comparable, which is useful and misleading. A price lets you weigh an hour of work against a meal against a piece of furniture, and it does this by ignoring everything about each of them except exchangeability. The shared language is real, and the equivalence it implies is not.

When you weigh a decision purely by cost, add one sentence about what each option actually is. Especially with time, care, and anything that cannot be repurchased. The number is a convenience rather than a measurement of worth.