Because not all earbuds "cut you down to just 1"?Earbuds cut you down to just 1.
Why would anyone even consider doing such a thing?
In my experience, it depends upon the earbuds used.
I use the "ambient aware" setting on my JBL earbuds. Environmental sounds are not restricted while intended audio is also heard.
I expect that other brands have similar settings. Others could confirm.
Cheers