I never liked these comments. I don't know, it just sounds petty and small-time to say X person would be essentially a bottom dweller only if he weren't the absolute best in the word at that one particular thing. Come on.
There's a ton of jobs you can be really successful at (and become a millionaire) without being the sharpest tool in the box. For someone to reach the top of a competitive profession like Snooker, let alone become the GOAT, it requires hard work, dedication and ambition. Talent alone is only a small part of the equation, especially in this game that doesn't require elite athlete genes. Applying those elsewhere would lead to success too.
Moving on... Ronnie's outbursts are often non-constructive. He's being honest here, but what he's saying is not helping anyone get better and if anything it's probably hugely demoralising as a young player to hear it. Sometimes it's better to say nothing if you have nothing constructive to say. But that's Ronnie I guess.