Well some people don't have the time to do that and they only want to put some money and wait for some time until their investment bear result, it is indeed more profitable if they can trade between the holding period if there's opportunity. I have some coin for long term investment but i also have fiat ready if there's opportunity because i also trade some coin.
Its not that some people dont have time to do it, but, they're just afraid of potentialy missing the opportunity if the price continued to rise right after the selling at short or midterm period of hodling. They're thinking, it would be more wiser and safer if they hodl long term, like if you buy Bitcoin at $6k and wait 2-3 years with a specific projected target mark. What they dont understand is how to ride the volatile nature of cryptocurrency in a safe methodology.