I played for years clicking, and consitently topped meters (played all roles), and managed not to stand in stuff. now I keybind and to be honest it more convenient for me, but I dont see any performance improvement really.
good players are good players, bad players are bad players, people put too much faith in the benefits of a keybind, and judge too much on clicking.
Do what you are comfortable with and ignore the ignorants who become all judgemental.