Bugsy, if I look at a daily chart, I see the same setups I take intraday, using "techniques" you've mentioned (e.g. price action, MA lines).
However, as a swing trader, you have the benefit of time to make sure the next signal "checks all of your boxes". You can make the bulk of your decisions when the market is closed, and this helps to keep emotions in check.
As a day trader, you need to be able to recognize your signals and make decisions without hesitation or doubt, as time is of the essence.
When you have a string of losers, if you begin to feel emotional pain, you need to be able to trade through it. There is no market "pause button" to regroup and collect your thoughts, and if the inevitable frustrations cause you to steadily deviate from your plan, you won't survive as a day trader.
In summary, there are certain behaviors which swing trading does not call upon, but that are essential to daytrading. I'm thinking a successful daytrader would have an easier transition to swing trading, than vice versa.