I think a lot of it is fear, ignorance, annoyance, and liability insurance, among some other issues.
Insurance runs the world these days, and they can also dictate what a club can or can not do if they want already and increasingly expensive insurance.
Another issue is the fear of having the range closed down due to complaints from increasingly hostile neighbors, especially in areas being built up.
Then you have the infighting amongst the shooters themselves. Different disciplines of the sport shoot differently and this can often generate problems. There are definitely "clicks" at local clubs and if your not in one of them, especially if your type of shooting isnt theirs, your going to have problems.
I used to belong to a club that started out with the one round rule for rifles and six for pistols. The board of directors was a bunch of narrow minded grumpy old men who thought you should shoot like them and if you didnt like it, go elsewhere. Thats fine, but there really was no "elsewhere" worth going to, so your stuck. Over the years things loosened up as the old boys either died off or were pushed out, and things got a little better, but there were always politics and clicks. We never could shoot rapid fire, or our full autos, or god forbid, draw from a holster, etc. After an unpleasant altercation with one of the range officers over a rapid fire incident, (my one thousand, two thousand count was a little quicker than his
) after about 25 years there, I wished them good luck and moved on. I suffered a little for about a year, but I now belong to a great club, 2 minutes from my new house, that has a great bunch of members, nice facilities with longer and more versatile ranges, and no restrictions on what or how you shoot. I may get out of this life a happy camper yet.