Its true. In WoW you can have hand holding healers which is like an unbreakable combo almost but in SWTOR it is Tank+Healer. In TOR it is almost impossible to outheal raw damage without there being a mitigation component involved. The reason being everyone has decent CC but guard is up all the time so you still have mitigation going on. When you CC in this game no healing is going out since there are few HoTs.
I am playing a tanking spec and have been enjoying it. As long as being utilitarian is your thing as opposed to OMG BIG NUMBERS kind of player I think tanking is a good way to go.