I usually dont put too much stock into this since some OL factories, like Wisco, just don't put much stock into this workout. But I do see it as a positive when a player is strong on the bench press.
Bench press is far less important at certain positions than others, LT being one of them, where you're paying for pass protection. You look first at the footwork, quickness, handwork, balance, arm length, hand size. There are still minimum thresholds. When you get in the low 20's with LTs for example, you need to look at how that might have been a problem in the tape. If everything else is there, it's a "so what" unless you're one of the few teams who want to "ground and pound".
One specific problem with the bench press relates to the player's arm length. The longer the player's arms, the more difficult it is to put up a good number. If you see an OT with wowza 35" arms, you're going to put a discount on the lift number.
When you start looking at interior OL, interior DL, between the tackle RBs, 2 down LBs, or a guy you project as a thumper SS, you want to see a good number. These guys spend a lot of time battling in close quarters or engaging opponents at the pads.
The lift can be misleading though in an additional respect. Different players are constructed differently. A guy may not have premium upper body strength but compensates with drive from a strong base. Adams, for example, put a up a poor 22 lifts, but he doesn't show that lower body drive either. He was taken this high for his athleticism, not unlike the Clark pick. That's why you might have seen a scouting report projecting him into a gap attack defense. So you have to consider scheme fit and how the player will be used.
Gap attack has not been Capers stock in trade. Maybe he changes it up some this season. Clark and Adams suggest that might be the case. Or maybe Adams will be limited to gap rushing on obvious nickel/dime pass downs. One thing you can be sure of: this player is no nose tackle, and the bench lifts help to tell you that.
The biggest problem with bench press is not the bench press itself; it's that they don't include other strength drills to assess the player's base strength as well. Squats and leg lifts for example. Perhaps some teams include those tests in private workouts. I couldn't say.