If folks follow proper procedures for safe firearms handling, then there should be no problem with firearms discharging in hotel rooms. Any training organization that would suggest otherwise would cause me to seriously consider the validity of their other training. They may be good in specialized training, but if they can't get the basic fundamentals right, then in my mind, the rest of their training would be suspect. JMHO
I sincerely hope that you were mistaken in hearing that the instructors suggested that ND incidents are possibly caused by their students.
As an instructor, you should know of all people that not everyone does what they were trained to do. Not everyone is vigilantly cautious about gun safety, even after taking a course. To blame the instructor or training facility for a careless student is the same as the media blaming the NRA, any other pro-gun organization, or gun owners in general, for crimes committed with guns.
To clarify, FS instructors urged students (at least my class) not to handle
firearms in their hotel rooms. They were not trying to discourage people from cleaning their guns or not to dry practice, but they cannot control what people do on their own. One incident involved "an experienced rifleman" discharging his rifle, which went through several hotel rooms (thankfully no one was hurt). Another incident involved two irresponsible guys practicing presentation by quick drawing and pointing at each other--one was still loaded and ended up shooting the other unintentionally.
I heard from several other students that hotels in the Pahrump area actually require guests to sign an agreement not to bring firearms into their rooms. Again, this is because of carelessness of prior guests.
While you are entitled to your humble opinion, I have first hand experience with a course at Front Sight. I am presuming you do not. Front Sight emphasizes safety quite heavily.
IMHO, four day defensive handgun course taught at Front Sight is better than any NRA course I took.