People who have used Tor who have been deanonymized in every single case that we are aware of made other mistakes ("altoid", "pimp_alex_91@hotmail.com", etc) or the vulnerability was in an outdated version of Tor Browser (basically Firefox). Of course you can say there was parallel construction, maybe there was in some cases, but if they didn't make those other mistakes there would be no case that could be brought against them because no one is going to be convicted on the basis of some probabilistic attack against Tor that the government doesn't want to reveal to begin with.