If every person on the planet used their computer to guess random seed words at the same time, it would take longer than the age of the known universe to find a wallet
Discussion
“To find a wallet” meaning a specific set of words. But I’m talking about just a random valid set. That’s seems much nuch easier to happen.
They are all valid sets. You can find a valid set in a single guess. But to find a set that holds someone's Bitcoin would take essentially an eternity