Looking at this from another angle, I certainly agree with you.
People that sold their bitcoin has been criticized enough even though we can see the green light they missed. It doesn't just necessarily mean they didn't think it through or didn't have anything to do at that point. It all boiled than to accessing their options and probably making one of the key decisions of their life. Its just like few years from now a different generation mocking us for sticky with bitcoin while there is something different which they know.
When you are investing, one of the purposes is to sell. If you don't have the intention of selling, then what is the purpose of investing? Even as people are interested when you are holding for a long time, and you have made enough profit, the next step will be for you to sell. And why are they mocking people who are selling because they don't make any plans? They invest very early and sell very early because some people are always fond of investing and then selling without making any profit.
When it comes to Bitcoin, we have to know or decide what and how we want the investment to go because when we don't manage these things well, then at the end of the day, it will be as if we did not achieve anything in the process of investing, and all this is because there is no knowledge and there is no strategy.