TBF I enjoy driving with TCS off - but turn it on when I need it. Generally if the car is running low-grip tyres for the power, the tyres are getting quite worn in an endurance race or if the car is naturally a bit of a handful (looking at you Porsche 996...) but if I can run with it off I find I'm faster without.
It isn't, and to me at least, has never been considered cheating. The only one that I've seen people get their knickers in a twist over is Countersteering Assistance - heard a lot of people call that cheating. In Sport I had it on as I found it helped me enjoy the game, in 7 I find it a bit too unnatural feeling... To each their own.
What you'll likely find is that people who lose call things like that cheating. A loser will clutch at anything to justify their loss, rather than accepting that someone may infact be a better driver than them. Don't get me wrong, sometimes it's the car, sometimes it's circumstance, but if you've lost to someone and the only thing you can do is call out their use of TCS then that's on you.
I drove in an endurance league and one of the guys was using auto gears and TCS, but he was competitive with everyone else - thus we all had more fun. Nobody likes being miles ahead or miles behind, it's boring.