Because you can do all that dumb crap from halfway across the map. It's not that people are bad, it's that there are four to five of you BH's doing the same thing.
No it's not, it's because the republic players are lazy and don't bother trying.
There were no more than 2/3 players on my team last night as BHs, and the halfway across the map bit is BS. I have the same range as anyone with force leap to get to me. I can also be stunned. Does anyone bother trying? No. They see a lightsaber and they immediately home in on that and leave the agents/bounty hunters to do what they want.
So while I agree that the BH abilities are OP and need to be looked at, tracer missile for example, the opposite team need to also play better. I must have been attacked about 5 times in 10 games last night. We just seem to be left to our own devices.