Monero is built as a privacy first crypto. Essentially it’s like cash in many ways. You spend it in the shop and nobody knows where the cash you’re handing over came from. When you get your change at the till you know nothing about who had the cash before you that you just got handed. It’s just money.
This is all handled by a bunch of very complex cryptography. If it comes to it there are ways to prove you sent the money etc but only you have that capability to decide to share.
It’s true that it all comes down to the deficit but it’s easier to create a calorie deficit when you include exercise. When “making weight” in the run up to fights I used to meticulously calorie count and aimed for a 1000 calorie a day hole.
When you’re burning 3500 calories, eating 2500 doesn’t feel uncomfortable at all (except towards the end where your fat levels get very low and your body is just constantly telling you you’re hungry).
But yeah, it’s all just numbers in the end.