Sure some traders don't know that they are traders. Some traders call themselves investors, even though they are not investors.
Exactly, you're right. I believe this is the reason why when they are into their trading practices like buying and hodli for few months or 1-3yrs, they sell when they are in profit. Hoping to buy back when the price falls. Many forum members here also are traders unknown to them, because if you ask them how to I go about investing in bitcoin, they'll say buy in the bear market and sell in the bull run. They will argue with you till infinity that they are not practicing trading, if you tell them. Instead, they'll say that they are investing.
In fact, for every investor, they do not have to ask when is the best time to buy Bitcoin because as long as they are familiar enough with Bitcoin accompanied by a mature level of knowledge, of course that is when they are better off buying Bitcoin without having to wait for the market to be down as expected by all traders. So from what you said, we can all actually sort out that only traders ask more often about the best time to buy because they do not target long-term Bitcoin savings except for targeting their profits.