I disagree big time. It's an "asset" but not neccesarily "tremendous" especially at the guard position. Our best guards we ever had -
Sue Bird, DT, Nykesha Sales, Jen Rizzoti, Shea Ralph, Renee Montgomery, Bria Hartley and Kelly Faris - imo none had "hops." Hops for a guard not as esential imo. Tiffany had hops. But what other great guards that UCONN had, had "hops?"
Kelly had good hops, better than Tiff.
But that's beside the point. The point is that exceptional hops are a friggin' HUUUGE advantage for anyone who steps onto the court, guards included. First of all, guards do go to the rim. They don't just shoot 3s. Guards also shoot the ball inside the arc. When taller players are in the vicinity, it helps to be shooting from a higher point. Also, I have -- occasionally --- seen UCONN guards going up for rebounds. Strange, I know. But they do it! If you take a player and give her a mid 30"s vertical, you have just given her something like a 10" - 12" leaping advantage over most any other player on the court. Even Maya's vertical was under 30" . 28"-29" or so.
Unless you want the guards to just run away, and never go to the rim, never go up for a rebound, or never rise up for a jumper in traffic, then yes, exceptional hops are something that any player would kill to have, and for good reason.
Your point implied a different question, which was "Are exceptional hops necessary [or sufficient] to make someone an elite guard?" Of course the answer is no, as you stated. Bird certainly doesn't elevate a lot. DT actually has decent lift, IMO. Bria no, Jen not sure, MoJeff yes! But this is a different point entirely. It doesn't carry much weight because almost nobody in the women's game has a 30"+ vertical. Besides Brianna Turner (next year at ND) and possibly Brittney Sykes at Syracuse, I don't know of anyone except maybe Diamond D who was a 30" vertical , let alone mid-30s like Gabby. I just happened to watch Syracuse play last night - unlike other players her size, Sykes is able to drive and elevate big time through traffic, floating in the air to get free for a jumper and snatching rebounds. Does it make her a great player? No. Is it a tremendous asset for her, in and of itself? Most definitely.
I'm guessing the player you were thinking about in your post above is probably Armintie (Price) Herrington, whose vertical is also well over 30". She went to Ole Miss and plays for the Dream. She's 5'9" and would not be in the "W" without that vertical.