Most architects are (or have been) good players; that's how they get people to listen to what they say about architecture.
By good players, I don't mean Tour players ... the Tour is a different game and most Tour pros' attempts at architecture make that abundantly clear. But, Harry Colt was a good player. Tillinghast was a good player. Trent Jones was a good player, until he got old of course. Pete Dye was a good player. And the list goes on.
I'm not at the bottom of the list, but I'm closer to the bottom than the top. To my credit, I have hung around good players enough to understand the differences between them and me, to hear what they like and dislike, and to know when they are full of crap.
Many in my generation of architects are VERY GOOD players: Steve Smyers, Jim Engh, and Dana Fry, to name three I'm personally aware of. I do not think it is an advantage to them as designers. All designers tend to design for themselves, and what's fun for a two-handicap is sometimes impossible for a sixteen.