sorry but yes it is very relevant until you have felt the pressure of fighting or experienced adversity in a cage against a skilled fighter you have no legit opinion
There's a few different sides to the discussion. Anyone can have a opinion. You don't need to step in there to experience it first hand to have a opinion otherwise about 99% of us here would have to leave these forums.
Just bear in mind however, that a criticism should be fair and IMO, most importantly never crosses the line to abuse.
Khonry Gracie could be a bum. But how does one come to that conclusion (fairly) after their first fight? Look at Aaron Pico for example. In hindsight, he was overmatched in his first fight (experience wise) but has now bounced back. Some people have even elevated him back to "blue chip, can't miss prospect" terrirory.