Why are Buddhist monks not as extreme as Jain monks when it comes to non-violence?

Why are Buddhist monks not as extreme as Jain monks when it comes to non-violence? For example Jain monks sweep the floor in front of them to avoid stepping on insects/microbes. As far as I'm aware, Buddhist monks don't do this. I'm guessing it is just that the traditions of the two religions through time have been different. But wouldn't it make sense for the Buddhist monks to be as extreme as Jain monks as they also try to avoid harming any living thing? Or maybe Buddhist monks could justify not doing these things as it would eat up more time in their day thus leaving less time for meditation practice? Thoughts anyone? Thanks