They kind of did somewhere in 2013-2015, so much so that a new term has been coined(transmedicalist) to describe those who believe that trans should be classified as a medical condition which necessitates that you need to change your genitalia and external appearance to fix the underlying mental issues of being trans. The 'new' definition of trans according to popular SJWs now is solely as an 'identity' that you choose if you feel it suits you(i.e. if you feel like a girl when you're really a boy w/o any underlying mental issues, distress or even visible attempts to 'pass' as the opposite sex or even hormone treatments, you can still identify as trans).