There's nothing particular "macho" about it. I think Bluto is intimidated by it.
Since I started openly discussing HIT I noticed that those who know for themselves that they're not capable of going through the kind of intensity that HIT demands will, instead of admitting it, will deny the effectiveness (even the science of it in this case) of HIT without even having experienced it for themselves.
The only other Getbiggers I know who are using or have used HIT are nodeal (my training partner), davie and Your MAaaaaaaaaa. And they will not deny it's effectiveness and difficulty.