The 4H are definitely not too close. Aside from Treadaway, none of them were kids when MotU was in its heyday. And Treadaway didn't even collect the whole life of the line. Don't recall exactly, but he was out at least as early as the Snake Men. So chalk them up more as fans of all cool toy stuff in general before you'd call them diehard, hardcore MotU fans. True, they did the relaunch, but as many nostalgia purists will tell you through wrinkled noses, those weren't exactly holding the originals as sacrosanct. Certainly not the Filmation stuff.
In fact, one of the big complaints from the MotU fanbase was how Mattel frowned upon the 4H's relationship with he-man.org, in particular the "off the books" consulting they were getting from Emiliano. Precisely because the 4H
know they're not the biggest and most knowledgeable MotU fans out there (unlike others who would attempt such a hubristic claim) they'd tap Emiliano, who aside from being a walking MotU encyclopedia has access to MotU lore that even Mattel and Scott were clueless about, thanks in no small part to Mattel's spotty record regarding treatment of their own creative talent and disregard for the potency of the brand beyond cash cow status.
Look, I don't wanna be in full-on "bash Scott" mode here. I do give him genuine and 100% deserved props for getting the ball rolling and successfully pitching his bosses on it--only
after, of course, the 4H already delivered an unsolicited He-Man figure better than any seen since '82, which any toy company exec would be brain damaged to not see dollar signs in, but I digress...

But after initially getting the greenlight he should've done the right thing and bowed out, serving as consultant only. Of course Scott would have us believe he was the only guy for the job, because he
really wanted that job. Turns out it's his entire motivation behind getting a Mattel job in the first place. So yeah, with that kind of bias you gotta take
everything with a Grayskull tower of salt.
Plus, you gotta consider his hand in non-MOTUC stuff and really judge the value of his influence there also. At the end of the day, as we've seen with Mattel in-house product, and really anything looking across the industry, DCUC would've been nothing without the 4H's talents behind that line as well. Ghostbusters? A fairly middling line overall. The GL movie lines? Less said the better. The (intended or not) insulting, dismissive rapport he's adopted with online communities aside, I just don't see a solid track record. And certainly not one deserving of the perks and influence he's had on the MotU brand as a whole.