Lots of things have a value that we might call “infinite” according to this argument. Everything from a human life to reading a book spoiler counts as “something you cannot buy back if you regret it later.”
Even if we choose to label some things as “non-fungible”, we must often weigh them against each other nevertheless. I claim, not that the choice never hurts, but that there is no need to feel guilty about it.
I think the whole concept of labeling goods as “fungible” or “non-fungible” is a category error. Everything trades off against something.
Either you value your fingers more than what [some specific amount of money] will buy you or you don’t. If you value your fingers more, then keeping them is the right call for you.