I am not sure I’ve ever said much about his talent being limited. Generally, I’m never going to limit what a player can do. He’s no different. When I say he has some uniqueness to him, that is not meant in a negative sense.
But when one discusses actual production, that surrounding talent matters. My life experiences tell me that slow pass catchers make your margin for error much smaller. That any QB reads are more difficult because the defense remains condensed longer while at the same time creating less separation. If you add in a mediocre pass protecting unit, then these timeframes are condensed even more. And all this before you consider whether these pass catchers have above average to elite abilities to make defenders miss. That has not been a Texas issue of late. I’d say less so than any other team.
Personally, I wouldn’t compare a G to a QB. Overall, in my opinion, our offense has underachieved relative to their talent the past 3 years. Allocate that however you like. It’s not one player or one factor.