Quite the contrary. As long as everyone is driving the same speed, regardless of speed limit, there is low probability of an accident.
Maybe, but everyone driving at the same speed is not a realistic scenario.
But if there is just one law abiding moron, so called "zawalidroga", one that have to be overtaken by everyone else in the traffic, while they are watching out for oncomig cars and cursing under theirs breathses a sunday driver, the danger of head on collision raises exponentially
But these people will still exist regardless - increasing the speed limit will not mean that sunday drivers will drive faster. Anyway, annoying as they may be, it is their right to drive cautiously and it is more the case that it is the frustration of other drivers with them, frustration leading to impetuous actions, that causes accidents - not the sunday drivers themselves.
Other drivers just need to deal with this more rationally and sensibly.