Youre right,different separators, numbers and even capital letters change my theory alot

Is it really safer? I mean when trying to bruteforce a password, one would have to make a guess whether it’s a passphrase or not. But if you decided to check for pass phrases, wouldn’t the one you posted be cracked in 5 times the amount of words in that dictionary? I’m not sure how large the vocabularies of the generators are, but I would guess a random 17 char password might be safer than a 5 phrases password?