Possibly because they don't know how to use weightless light beams but have some familiarity with steel weaponry. Let's have a breakdown:Combustion Kevin said:I'm only left scratching my head as to why they lunge and swing like they're wielding steel weaponry, as opposed to weightless light beams that they are.
- Rey is shown to have a staff thingie she fought with. Given that she's a scavenger and her familiarity with fighting, it's nor far fetched to believe she might know how to swing something akin to a sword. Or, you know, a bat. At any rate, she literally wielded a lightsabre for the first time in the very end of the movie.
- Finn has had storm trooper training. While I don't think we know exactly that encompasses, close combat is conceivably a part of it. We see a storm trooper going melee against a lightsabre user, thus lending even more credence to the idea. Again, though, they would likely not have any proficiency with lightsabres - again, something like a bat or a more traditional sword is more likely. I really doubt storm troopers would be masters of those weapons, but I can see them at least covering the basics. Still, Finn uses a lighstabre twice in total, and not for that long, either.
- Kylo Ren has had a lightsabre for the most of the three combatants. Emphasis on had - I am not sure he really knows how to use it. Especially against other lighsabre users. Reinforced by giant evil Gollum remarking to the effect that Kylo has not finished his training. Ren is also shown to have a short temper and swinging wildly when agitated.