99%? No. Clicking is only ok for pve stuff. Anything pvp and clicking is terribad.
The only reason people consider it "bad" is because they're not used to clicking, so when they do click, it becomes unnatural to them and their results are diminished. If you've always clicked, such becomes natural, and you results adjust accordingly.
I click. I'm not the best player, but I can certainly hold my own and perform as well as any other player. In a Novare match yesterday, I came out top in kills, tied for lowest number of deaths, second in total damage (beat out only be a smash monkey), and we won. Not perfect, but overall a respectable PVP showing for a physically handicapped old lady. (really)