Depends on the enemies. 2 hits from the large clubor rock throwing dudes, for example, could kill you, same with the knights, the sentinesls if you're somewhat fragaile, the giant skeletons and bone dogs, and in places like the tog or with enemies like the knights (who have bows) it could quite easily border on impossible to get the space to switch, and so you die.
I couldn't do it in the tog at all. besides that however, I have essentially memorised all the locations of everything, so yeah I can make 2 seconds pretty much anywhere.
If I'm going into new areas, with new emenies, this is no longer true. I don't know the layout, i don't know if they have ranged attacks or charging attacks to catch me (running from silver knighsts at this very moment can get you shot. ents and channelers and archers can all kill you if you try to run away without looking at them) so I have to look at them to avoid them, which means I can't see where I'm fleeing to (or what I'm fleeing into) and when i haven't memorised the area then no, I'm not likely to be able to create 2 seconds for a stationary weapon swap animation.
cheap deaths are cheap deaths, no matter how spaced out they are, and you connot know that. Were i running magic weapons in dks right now, I'd have a ton of trouble with the catacoumbs, I'd be completely useless every time an opponent used gmb and I'd be incapable of the dlc. if its a magic zweih and my catalyst, then I'm now a poor match against all of the knights, the thieves, the dogs, the giant skeletons (both kinds,) the bonewheels, the rats, the channelers and gwyn.
Thats more than 2 or 3 times.
in pvp, as meln said, type order deaths. A death simply because you were not built to stop that type of build. In a 1v1 pvp setting, this is not a good thing. its not a test of skill, its if you got lucky enough to get someone that your preasent build can handle.
The menu swap gives you the ability to deal with bad typings.