Well you can call my post a lecture, and I can call your post a rant, and it's all good. We all post our experiences, and my experience is that MS sells a good product.
There are times people may need a quick repair and don't have time for mail order, so your suggestion may help guide them to a solution that fits their limitations. But the governing limitation in this case should be time, not money. That's my advice, and it's worth what you paid for it.
I'm not sure why you're so offended by my post. I said that I did essentially the same thing you did (look for a cheaper solution), but instead I learned to appreciate a superior product.
As someone who has spent my entire career doing polymer R&D for Fortune 50 companies in the paints/coating/ink/adhesives/sealants industry, I have some useful input and I will continue to make it. You are welcome to make yours too, and if we sometimes disagree, then the readers will be smart enough to decide which advice to follow.