Reason 1: I find them visually appealing when I launch them out of my Mech, or seeing them flying around in the sky. The sound on the larger LRM launchers also sound "cool" . It's even cooler when I see a couple hundred of these in the sky at once. Peace through superior firepower anyone?

Reason 2: I like to play as the artillery role. Don't get me wrong, I'm NOT a big fan of point and click, I just like to provide fire support for the team! If Mech mortars or artilleries were implemented in, It's very likely that I would be using those a lot.
Reason 3: The biggest reason why I play the lurm game, is because I have sh!77y FPS. My average is around 15. In CW, it's 8 (assuming that I'm lucky enough to connect, AND avoid watching a very slow slideshow of a battle for 30 mins). Lately, I've been getting random FPS lag to the point whenever I get one, I die. It's infuriating. I want to participate in battles, but if I want to be anywhere near helpful or successful, I need to go Lurms.
I don't like point and click, but those are my reasons why I play the LRM game. Personally, as one of those that uses these, I don't find them OP, but I do find them annoying. (I mean c'mon! point and click from like a 800+ meters away, who wouldn't get annoyed?) An oblivious LRM boat pilot is almost as useless as an AS7-DDC that has lost both side torsi running a STD engine. LRMs are not OP, they're annoying. If you're getting killed by these, you're probably doing it wrong.