Post History

Why are posts that users clearly approve of are being closed?

One of the most annoying things about stackexchange has always been the borderline fanatic post closing or duplicate marking. Another question in meta was posed some time ago about the added value of this site. Olin pointed out that "This site grew out of frustration with how SE was managing their sites", mostly aiming at the fact that the site was driven by financial intentions that lowered the quality of the site. Or whatever else that he had in mind, it's irrelevant. 
https://electrical.codidact.com/questions/278821 -> This is a great post in my opinion. From the answers, it seems clear that it is not off-topic. It's an EMI issue, was identified as such and explained. This isn't 'What microwave should I buy?' or something similar, which would be off topic.

The question has a score of +3, so 3 people liked the question, which, taking into account current population of the site is considerable. 2 people answered and gave good answers! Now it is closed. It sits at the top of the list, and other people cannot add more value to the question, because answers are locked. Maybe Andy had something good to add, he usually does. Maybe someone else.

Of course, this is opinion based. But the message I want to get across is to not become like SE, where questions were closed just because the user had the privilege to do so. Community found the question interesting, closing it seems quite uncalled for even if it did not strictly match the on-topic guidelines letter-by-letter.