True, but let's not try to extrapolate so much from a single phrase like our friends, the solascriptists. If a Hobbit, living in a hobbit home, with Hobbit doors can't get through it, then he has had more than enough. An Orc does not live in a Hobbit home, nor does a Hobbit live in an Orc home. It would be like me travelling to your rock and finding I can't fit, because I'm too fat. But, lo, I go to my own home and I merely have to grease my sides with Crisco and I enter a room easily enough.