Wtf are you serious? I've been rebinding my mouse keys for the last 4 years and have been living in fear that I will one day get found out and be banned. Just last night I woke up in the middle of the night drenched in sweat because I had a nightmare that someone knocked on my door and when I opened it it was Peppy.
Unfortunately, it indeed is considered cheating. Peppy stated in a tweet last week that anyone who is caught using keyboard inputs is cheating for tapping will be automatically banned. Accolibed has recently been permanently banned and has his house raided by police after setting a mind breaking 87.27% FC on the one and only Harumachi Clover, an astonishing 142BPM and obtaining the osustd pp record worth 6pp. The fact you are not yet auto banned is completely unprecedented. Governments all around the world have outlawed using keyboards for playing osu! and has declared it to be "high treason", anyone found doing so will be immediately hunted down and executed. It is very likely that the government is tracking you down as I speak, all while giving you a sense of false hope, self-accomplishment, and the illusion of safety. Run, if you value your life. The frenzy has begun. The moon is red. We're out of time.