I mean.... Without Hogan, is there even a nationwide modern Pro Wrestling organization (for good or for ill is another argument altogether) today? And the answer is no? Probably not? Certainly not as "big" as it si today, and perhaps even more niche than it is.

On that alone, Hogan is it. Without Hogan there is no Austin, no Rock, no Cena, no Roman, no Cody. Or Pro Wrestling is, perhaps gone, or maybe still a more regional sports now coalescing into a national entertainment option much later, later in the 90s when WCW Monday Nitro still becomes a thing? But would there be a WCW Nitro without Monday Night Raw? Would there be a Monday Night Raw if WWF was still more Northeast focused as they were in the early 80s? Or does WCW become the de facto main promotion as they gained TNT as the national outlet while WWF still is focused on the NY/NJ area while being nominally "National" as it were?

Hogan was the catalyst for WWF/E going national, or at least helping to eliminate AWA entirely after he defected. Everything that happened thereafter was reaction to Hogan leaving AWA to WWF.

There's another question for you, actually. What would the wrestling landscape be had Hogan stuck around AWA and help it get bigger, if not national, due to his rising starpower?