If he plays OLB a full boat of snaps, then I'm assuming that means the Packers are paying Preston Smith all that money to sit on the bench?
I said I was moving on, but since you persist, I'll take one more stab at it.
You have a fundamental misunderstanding of how edge players are used. Since you appear to have some kind of obsession with the 49ers, you might find this instructive, regardless of the fact they run a 4-3.
The 49ers had Armstead at DE going into last season's free agency period, a #17 pick in his 5th. season, a pretty good, versatile player, good enough that the 49ers exercised his 5th. year option. Then they signed Ford for the edge to a $16 mil/yr deal. All set? No, they took Bosa with the #2 pick. Redundancy? Lets look at the snap counts over their first 10 games before Ford was shelved with a hamstring.
Armstead: 74%
Bosa: 73%
Ford: 38%
Add those up and you get 185%. That means on average they didn't even have two of these guys on the field for 15% of the snaps! And it's not like the 49ers defense was playing a lot of high snap games where these guys had to take a lot of rest snaps. The total defensive snaps over those 10 games averaged 60 per game, below the league average.
Now, Ford came into the season with residual knee issues from the prior season. They kept his snap count down to a pass rush specialist count to save on wear and tear. The total snaps among these 3 players probably would have been higher if Ford were 100% because they like to move Armstead inside in nickel, just as we have been discussing with Z or perhaps eventually with Gary.
It's worth noting that with Ford on limited snaps they still kept their other two guys under 75% snaps. That's a prudent thing to do to keep those guys fresh.
There is no reason to think Smith/Smith/Gary couldn't each have 75% snaps, 225% total, or all 3 on the field for 25% of snaps on average. That's preferable.
The topic was redundancy. You are conflating redundancy with your dim view of Gary's potential. If he develops into a player, everybody gets the right amount of work. If he doesn't then he won't get the snaps.