In fact there are many, probably the majority, who take the view they will treat on occasion if need be rather than let a hive die, cos to them the sensible course would be requeen it, which achieves the same aim of improvement, without losing the bees.
The most extremist, in terms of one way or the highway type philosophies, are mostly new beekeepers who have not been in it long enough to learn the several different sides to a story. Of those, for some their extremist one way views work out and they stick to them, some spending their spare time taking pot shots at everybody else, but the majority being grateful for their good fortune and being gracious and helpful to everybody else. For others it does not work out, and they either modify their views to some extent so as to keep their bees, or find themselves not in the hobby any more.
And of that group who do modify their views, based on what I read on Beesource, many of them have total non treatment as their end goal, and many of them end up achieving it. They are not usually bashing everyone else over the head about it though.