There is so much more to playing QB though than arm talent. Ability to read defenses, decision making, ability to manipulate defenses and create openings amongst other things. Marino had a crazy combination of a quick release, arm strength, and accuracy but even with all that doesn't necessarily make him the GOAT QB. We saw with Brett Favre his bad decision making do him in way too often.
Marino is like Rodgers in that eye test wise they are absolutely amazing but when looking at their playoff failures a lot of times it came down to the offense that got them as far as they did eventually fizzled out in the playoffs.
It's easy to look at highlight tapes and declare someone the GOAT but it's the stuff they do between the highlights that really defines them.