I think you're overestimating how much interest the majority of wrestling fans have outside of WWE. On these forums etc where you have fans so obsessed over a simulator, most will of course have knowledge of the top indie stars and those competing abroad. However the vast majority of US fans are going to be people who simply follow WWE and nothing else. WWE has shaped their company on their viewers being loyal to the product, and given their audience makes up the vast majority of the wrestling fandom, their wrestlers are much more prominent in comparison. Just because most workers have widely available videos etc for the whole wrestling audience to view, doesn't mean the available audience are going to view it.
In terms of perceptions, as someone mentioned, ROH have 22 major stars. For instance, Silas Young, Dalton Castle and a few others who have never wrestled in a major promotion are pegged at 55 popularity. I'm not disputing that they are solid workers who, if given the opportunity, could work their way up to a decent position in NXT. However the mod in effect states that they are as well known to wrestling audiences as Bobby Roode, Bobby Lashley, Jinder Mahal etc. That is simply not the case, the latter three have had far more exposure to the vast majority of the wrestling audience over the last 4/5 years simply by being on WWE programming.
For instance, if ROH signed Willie Mack to a contract of course this would make a splash to some degree in wrestling circles, he's a good worker for NWA/Impact, is X-Division champion and could occupy a decent sized spot on the roster. But it's nothing out of the ordinary. However now imagine ROH signed one of Roode/Mahal/Lashley - that would be a huge coup and would be massive news having an effect industry wide - how have ROH managed to nab a WWE midcarder? It would be massive news for a company the size of AEW, let alone a company like ROH who have a tiny fraction of the same exposure. Yet in game they're apparently all as popular as one another.
At the end of the day there's a reason why Youtube results for the likes of Dalton Castle, Silas Young etc have <100k views yet videos with the likes of Bobby Roode, Lashley etc have >1m views - they're just far more well known and popular to the wrestling audience as a whole.
I'm really trying to be constructive, I like your mod but as others have mentioned, the way popularity has been weighted makes it unrealistic.