The answer to any question saying "is this vast artistic field AN AWESOME THING or A SHITTY THING" is always "yes". Some people do really cool stuff. Some people just make a big mess. Some of the people making a big mess will go on to do cool stuff.
Glitch art is kind of cool, but it also seems to be a little out of control. Of course you could find some ways to control it properly, but overall glitch can't really communicate anything other than madness and acid trips. At least that's how I perceive that.
An effect that some people find cool and apply to their art. I mean, cutting paper is considered art, of course glitch is considered art as well. As long as some people find beauty in it, it's okay by me.
If it's done the right way, it's awesome. If not - it's not.