There are a few questions, e.g. this and this that I feel are getting downvotes for no reasons beside requiring a real expertise to answer them. They may not be phrased perfectly, probably because coming from new users, (yet there are tons of users eager to fix even the slightest error in other peoples` post, so that should be no problem) but to someone with the right knowledge they look absolutely reasonable and answerable. So WHY downvote them?
The questions you're pointing two have one downvote each. I downvoted one of them. I didn't see the other until following your link, but I think in both cases the existing comments captured the problems with the questions. In your first example, the question is based on a false premise: "why don't we have x" - we do have x. I can imagine a good answer to that question, giving a brief overview of helicopter auto-pilots, but I don't think the question is useful or interesting.
In the second example, the question doesn't explain what's missing from the questioner's understanding. Are they asking for the physical principles of IR fire detection, or how the detector interfaces with other avionics systems? It's really not possible to write a good answer without knowing that.
I don't think either question needs much domain expertise to answer. I don't think the problem is with the phrasing in either case: it's with the preparation that went into the questions, or lack thereof.
In your second question, I did not down-vote but I did vote to close. My reason is that the question (at the time I saw it) was not related to aviation; it might be better on Engineering.SE or similar.
The question also lacks focus (analogy: "Explain how a compiler work?"). The scope of an answer can scale from a few paragraphs to an entire chapter in a book. From these perspectives, I can understand why it was down-voted.
My advise is not to take down-votes too personally; rather take them as a signal that something can be improved. This community is pretty helpful and usually someone will pass by and try to edit a question to improve it, but not everyone does that.