Weed

Good morning.
About hot water weeding system to remove weeds
I was researching it all yesterday.
When I looked this morning, there were fewer weeds in the areas where I sprinkled high-temperature water.

However, I suddenly thought,
When high temperature water of nearly 100 degrees is sprinkled on the soil,
I wonder if things like worms will disappear.
Even if you observe the farmers in your neighborhood, do they steadily remove weeds by hand?
, I've only seen one using a mower.
There must be some reason after all.
Research is needed on this subject.