Whenever Hollywood depicts a sword fight, they tend to go on forever. While it could potentially happen that two skilled fighters could last a ‘while’, in general whoever gets on the wrong end of the pointy bit loses and then dies. Though he might be able to take his attacker down with him, so always keep your guard up.
Of course if all the sword fights in movies were over in 2 seconds it would be make for fairly boring movies. It’s one of those things you just have to accept when watching.
That said I always find it very impressive what sort of choreography they can come up with. It’s never easy to pull those things off.
Lastly, don’t use this comic as a guide seek a serious school if you want to learn this stuff.