I'm not saying G5 teams have no chance, just that they have very little chance. If you want a shot at that chance you have to have multiple seasons of sustained success and a willingness to schedule quality P5 opponents as your out of conference opponents (see what Boise and TCU used to do). GT and Maryland are two tiers beneath what you would need to schedule.
Most of the criticism was based on SoS, I saw very little of that talk you're citing. I'm sure it happened and you can link it, but at the end of the day they're the same argument and it's still valid. You didn't play nearly a difficult enough schedule.
...and of course there's a P5 bias, look at the committee composition. G5 schools/conferences have nobody at the table.