Telemarking is actually less "pure" - the telemark turn was first developed by ski jumpers, who don free heels, as a way to stop after their jumps. Fixed heels have been around longer.
Telemarking is, however, more pleasureful, blissful, etc. You sink lower to the snow, get more face shots, and access more powder with less hassle.
From a breakage point of view--good luck fixing one of those plastic-y space age looking DH bindings. My (tele) bindings are METAL (steel actually) and are held together with BOLTS. Easy.