No one is against swing trading, but it has to be learned and know how to avoid or minimize losses but maximize profit. I did not against swing trading, what my advice was about is that it is not good to hold fiat too long as described in the OP if you want to maximize profit. Multiple swing trading is not bad in 3 months, but just one swing trade in over 3 months or longer is what I am talking about, no one againsts swing trade here. The problem will be during bull market, the strategy will not help.
I am "sort of" against it. Because, there are better ways with the same amount of risk people are taking. I mean imagine the fact that we are in a situation where you are taking 50% levels of risk, and the returns are 70% for it, we can't put a data on these things normally but I am just giving an example.
I believe that there are better stuff with under 50% risk, with over 70% reward portion, so why pick swing trading when there are better options out there. The percentage numbers are of course example like I said, so it's not guaranteed and many would disagree with me, but I just feel like it's like that and I would prefer other methods instead.