It's really because they havn't gotten used to it.
My friend, a crazy hardcore Halo friend, came to play REd Steel.
He got used ot the controls, took him like 30 minutes though.
But after that, I feared his sniper skills!
By the end of the few hours we played, he was like, "This would be so much cooler if it had online."
But he thinks the pistol is overpowered. A single headshot and BAM! Dead! With default gun!
But anyways, once you get used to the controls, you start to have fun.
Until the cursor starts jumping when you're in really lighted areas -- then it's not so fun.
But it's 90% fun.