To be fair, I don't think it really much matters for Windows users, unless you like to run every random installer, batch, and email attachment you can stumble across.
Which is to say, for the uneducated user, true, probably good form to use a non-admin daily account. For the informed user, they probably have at least decent enough practices.
I don't think exploits in established programs, like browsers, will be prevented by the lack of admin privileges. I might be wrong on that.
If you live in the deepnet, well... I think it would be especially prudent to run with low-level privileges. Outside of that, I find one likely won't be encountering enough security threats--if you are in informed user--to make a difference.