For me it isn't the deserts that need balancing out, it is the desserts. And if the scale is accurate, things seem to not be equitable long term.

Truth be told, I enjoy a weigh in on vacation if only to test how much uncompensated gluttony has occurred so far.
While traveling for mundane reasons I must agree that they serve some value as luggage scales (although my next one might be able to weigh itself.)