How many world championships did Jake Roberts hold? Scott Hall (RIP) Dean Malenko? Etc.... so their opinions and knowledge on wrestling would play second fiddle to Omega's?
It's not about playing second fiddle to Omega it's about not discounting Omega's opinion because he didn't wrestle in the same era as Disco .
Do you honestly believe Omega would have been main eventing during the Attitude Era?
Absolutely. He would've been having banger matches with Eddie Guerrero, Chris Benoit, Chris Jericho, Great Muta, Sting, Flair, etc. Definitely a WCW and IWGP World champ and possibly a WWE World Champ. If Benoit and Guerrero can be WWE World Champ then Omega definitely could. Just as talented as those guys in the ring.
Omega would have been just like Disco, relegated to the midcard.

You're insane if you believe that. Disco isn't in the same stratosphere as Omega.
Yes, Omega has been world champ in four different promotions, three of which hardly anyone in North America care about.
Only casual fans don't care about it. Real wrestling fans pay attention to shit outside of the WWE.
Disco is like a bench player who soaked up a ton of knowledge by sitting on the pine.
Disco ain't saying nothing that's profound. Omega has gotten praise from the best in the business. Austin, Danielson, Flair, Angle, Jericho, Hart, etc. Who the fuck is praising Disco Inferno?
Just like how it's rare that many top guys become the best coaches in the NBA, some of these midcard guys have better insight in the business because of the roles they play.
That's a false equivalency. A basketball coach runs a team. The equivalent to that in professional wrestling is running a promotion. A mid carder wouldn't have any better perspective on running a promotion than a main eventer would. There's different variables that play a role in that.
Omega is just obsessed with Japan and wants to Cape for anything critical of Japan.....the way you Cape for anything critical of AEW.
I'm sure Omega has no problem with criticism as long as it logically has merit. Disco saying that Stardom wrestling won't translate well in America when you have a guy who sticks his hands in his pockets, fake kicking someone in the shins, a guy who wears a dinosaur mask, a guy who dresses up like Tarzan, yet the Stardom women are silly. The fuck outta here.