Etherium is a database. It's a database that contains scripts (not unlike bitcoin) that some computers can run if they want to determine the balance of accounts.

Etherium itself is not a computer, that's marketing speak.

Stripe kinda does have use for this it turn their platform into a much more powerful tool where you can do extremely sophisticated economy based financial automation on your funds held with stripe. Essentially you get some crazy good developer experience which is not possible on tradfi rails.

Technically, it's a program, not a computer; Ethereum still needs actual computers to do the computing.