A nerd friend of mine once put it this way (sort of).
Lemme 'splain first. In math and engineering, you don't always care about "precise". You care about "close enough".
As in, you don't need pi to infinite places - ten is probably all you'll ever need.
So sometimes in equations, you can neglect part of it if it's really small.
Like x + y is pretty close to just x if it's a LOT bigger than y. For instance, 10,000,000 + 1 is pretty much 10,000,000 for all practical purpose.
We show this by saying:
x >> y -- x is a LOT bigger than y.
My nerd friend said :
1 >> 0.
Basic law of human inertia.
You can get something done, but getting started can be harder than just doing it.
It may be a small thing - 1 is only 1 more than zero - but it might as well be infinity to some lazy ass.