BTCUSDBTCUSDT Scalping and daytrading is cool(some here are really good at it), but I am sure there are some here who would like a little more freedom than that. Swing trading is all about combining TA with time in the market. Even with scalping and daytrading you don't enter a position expecting your target to get hit in a specific amount of time.
Every trade a successful trader takes has different lengths of time they are in the trade for. Sure they would have an average hold duration, but no one is saying you have to time the market to the minute, hour, day, or week to be a successful trader. You simply need to close trades in the green instead of in the red to be a successful trader.