I have experience with tweakers through my job and combined with the strain of early sobriety I can see why your friend eould freak out. I do not see how rooming with someone in that condition would benefit his treatment. The counselor was probably not willing to go through the red tape of moving the addict.
That being said, good for you for sticking to your guns.
if your friend is serious and not quacking, he can go to another treatment or stay out, sober and attend AA.
Time will tell.