OK, let's play with a scenario.
Instructor 1 is a very capable instructor, who's being flying since Noah decided that water wasn't a good thing to be living on.
He has trained a new instructor, Instructor 2. With the best will in the world, Instructor 2 will only learn a percentage of the things that Instructor No 1 knows. He now starts flying with students. The first issue is that he may not know all the methods that Instructor 1 knows and uses, so to make sure that he's comfortable when close to the ground, and maybe even more so when flying with a student that he does not know well, he will revert to what he's comfortable with, even if that causes the student some problems.
Now it gets interesting.
Instructor 2 relatively soon has to train instructor 3. With the best will in the world.................
Instructor 3 starts flying with students. His total overall knowledge is probably at best 75% of what instructor 1 knew, maybe less, so the chances are that a student flying with Instructor 3 is going to have to do everything exactly the way Instructor 3 does things, to avoid Instructor 3 getting severe pukker factor every time they get close to the ground.
Repeat this scenario more than a few times, because most of the instructors move on just as soon as they can get their Frozen ATPL/IR, and if Instructor 1 is no longer on the scene, what do you have. You have a lot of relatively inexperienced instructors who are scared to let their students do certain things close to the ground because they are not comfortable in their ability to recover the situation if the student does get it wrong, because they've not had enough flying experience themselves to develop the skills they need.
That's happening, probably more often than some people care to admit it is, it's happened to me, a few years ago, I went to a training organisation to do a specific rating and at the time, I had over 300 Hrs ME experience and a UK ME IMC, and I suceeded in scaring the first instructor I went with s**tless on our first flight, as he had the grand total of 20 Hrs total ME time, yet he was instructing, but wasn't in the least bit comfortable or confident in the aircraft, and with close on 300 hrs in a similar type, I knew exactly what the aircraft was capable of and got on with making it do it, but the instructor's experience levels were such, he couldn't cope with my different style of flying the aircraft, even though it was safe. I didn't need training how to fly a ME aircraft, I was there to do an ME IR, but we had to start somewhere.
Suffice to say that after that trip, and a discussion with the CFI, who had not looked too closely at my experience before allocating the instructor to me, there was a rapid change of instructor to someone who had sufficient ME and instructing experience to not get in my way, and from that point on, it worked fine, but they were lucky in that they had experienced instructors on call. Some training organisations don't have that level of resource available, and that's when things get difficult
In the same vein, a LONG time ago, as a very low hours student, I nearly got killed by an instructor that wasn't prepared to admit that he was way out of his depth, and we ended up in all sorts of strife as a result. I never flew with him again, and a few months later he was "advised" to find alternative employment outside of the aviation industry!!!
Part of the problem is that for years, instructing was a means to an end for too many people, so it didn't attract the money or the people that were genuinely interested in instructing, and we're now seeing the outcome of that, in a lot of cases, there are no longer instructors available with long experience, and that's making for the sort of issues that people have been complaining about.
There's more than one way to do certain tasks, and as long as what's being done is safe, the instructor should have the skills to allow the student to operate in the manner they are used to.
OK, if it's not safe, then by all means correct it, either by correcting the incorrect technique, or by teaching a more appropriate one, but only for the reason that it's necessary. If it's because the instructor is not comfortable with his (or her) ability to recover, then the instructor is the one that needs more training.
Controversial? Maybe. Accurate? I fear so.