It's not an entirely new notion either. I was a teenager during ECW's heyday and I got to go to a show right around my 18th birthday in 1999 in Boston. It felt like a big deal that I got to see ECW, even then. Likewise, it felt like a big deal when ROH came to Boston for the first time, like I got to be part of this wave that was happening. So I get the notion, especially for someone who is 16-25. it's just expanded due to the rise of social media. The fact that Bullet Club shirts have made it into Hot Topic and are probably scraping up against the idea of being socially acceptable (while still being hip and elitist in some way) plays into it too. It's not like walking around with a Randy Orton shirt on. "No, this is different."
Again, this is them tapping into something as tangible as Watts using JYD to tap into something in 1981 or whatever.