Parsers don't just reveal the weaker links in a group. They show why. This alone does not "stifle them from being able to learn and advance and get good." It simply shows them why they're not doing that well in detail. After all, mistakes and results prove to be valuable teachers to help us advance. We learn from them, we take the information they have shown us and we progress. An in-game parser will help strengthen the community and proper use of it will encourage others to ask how they can get better. The only ones who will not use a parser properly are those who are afraid of being called out on being bad and show no willingness to improve, or elitists who hold unrealistic expectations who would not hesitate to dismiss someone from not putting out numbers similar to some of the best players in the world.
A parser should never be used as a gate, but a reference tool to help us improve. The fact that you express concerns about the community blindly following what a parser says tells us that you don't have a proper understanding on how a parser can be used in a beneficial manner.
It's more about harassment than it is waving around the e-peen, which I should've been more clear on stating. Unfortunately, there are people who abuse parsers based on unrealistic expectations they may hold, or outright abuse it as a means to grief others. This mindset must not be tolerated and should be expunged with extreme prejudice. The GMs, to their credit, do take harassment reports seriously and will investigate the matter. I am confident that suspensions would be meted out if a sanctioned in-game parser was abused for purposes it was not intended for.
Please do not encourage fear-mongering against parsers. Encourage informative playing, which is what a parser would help realize.