I agree. I can understand it when it's really hot and humid. Unfortunately it's happening at indoor tournaments as well. And after every single point, even if it's an ace. I saw one guy doing this at a local tournament here so even the club players are slowly adopting this habit.
Even after an ace, you gotta wipe off and think about the next point and calm your nerves.
No wonder players take 30 seconds between points. I bet the likes of Borg and Johnny Mac did not pussy foot around looking for a damn towel they did not need. It did them no harm did it. You don't need a towel to decide where to serve or which serve to hit. That decision takes 3 or 5 seconds. Players have to cut down on the towel trips. After 3 or 4 points I can understand but almost every point, you can't defend that.
When you start seeing atrocious club level players doing this, you know that it has gotten out of hand. Nothing more pathetic than seeing some 50 year old, overly serious, delusional clown act like the top players.