The inconvenient of blockchain (or crypto-this-that, whatever you call it) is so overwhelming (evergrowing computer amount with its evergrowing pollution), that I have always found strange that the benefits are not more obvious (still no clue).
But perhaps you will give me a clue, that is as simple as my few word description of inconvenient, a kind of blockchain benefit for dummies in a very simple few words sentence:
Pro: ___ _ ___ _ ___ _
Con: evergrowing computer amount with its evergrowing pollution