Well, this is precisely what leads to dilution of the art.
Well, yes it is a problem if some one trains and never cares what other's say about their training. Everyone needs a reasonable outside perspective of what they are doing.
My comment was to how emotional the poster's response was to what he deemed as a failure in miss Mary's training. You should care, but it shouldn't anger you. There are things worth being upset about and things that aren't. In the end how some girl in New England trains doesn't effect one's own training.
The President of my Federation once said "Some schools are so isolated they start to believe their own shit!" He seems to ignore the yahoos outright, not argue with them about how they are wrong.
I'm not in any way saying that miss Mary's school are yahoos however. I don't know her. I don't know which school she goes to, nor do I know if she is a reflection on their principles.