No one is saying it's a "problem" - they're pointing out that his fear is completely irrational and unfounded.
If he wants to seal himself behind 10 tons of armor at night because he's afraid winnie the pooh might try to murder him, then he's free to do so. He'd likely be better spending that...
There's a 2010 Bengal CX on RVTrader right now that boasts exactly 6'5'' headroom. Maybe worth looking at?
Pretty slim pickings right now, especially with vehicles like Tigers. I hope you find the right one for you!