Bro i blive its a good one, some times u have to make delays even with loops itself,default value in loop .02 seconds we made it 2 first then another loop to run it 4 times.

Time sleep is very useful for any task that you want to run at an interval.
For example if you write control software for a camera. If you want 10 fps, you might time.sleep for 100ms.

Or you might have a web scraper that should refresh every 6 hours.

There are even safety reasons. Making your code slower helps deal with timing attacks:
https://www.techtarget.com/searchsecurity/definition/timing-attack

Just read mine and you will be experiencing a brain aneurysm in no time. I seriously have no idea what I wrote anymore.