I have kind of problem that I keep asking for doubts until I understand the answer a good deal (one of the reasons is I'm not so good at English). On all SE sites where I ask questions. (Doesn't mean I don't do research while reading answers. I'm open to it as my ultimate goal is to find the answer, not to ask bad questions and break rules). I asked similar question on GDSE Meta. So I got answer in my favor. Since then I had assumed it's okay. But on my recent question here, the response made me feel I made a terrible mistake by asking questions in comments. It really made me feel bad because I had always believed it's okay to ask questions in comments.
I understand my main question might be off topic / poorly asked or rude. I'm just learning to improve things. Even if someone clears my doubt here about asking questions in comments, I'll keep that in mind for future.