I concur with much of this. I'm a sub bottom, I like being locked up during sex. I view my ass as there for his use and abuse, being caged definitely reinforces that.
Occasionally I'll bottom if a top wants to make some OF content, so my focus during it is on positions, angles, lighting etc, and the last thing I'm thinking about is when/if I get off. So being caged is more than fine to me, it actually is one less thing I have to think about.