Why charging extra for esim for smartwatch?

I’m trying hard to understand, but still can’t: your tariffs are already not low, around 2x higher than other providers, and you still charge 5,- for eSIM for smartwatch. It’s not used very often, even almost not used by people, and could be nice to have when you really forgot your phone or it went out of charge -- but just knowing that you’re charged for that nice-to-have thing every month makes me opt-out (and even regret that I came to here, as I need to wait now till the end of the contract year). That’s all so sad in 2023.