A question to the Sound Engineers out there

I really enjoy the way in which, some sound engineers have the ability to create tracks that sounds like the recording took place in a much larger physical venue outside of a studio

But based on the pictures I have seen of some studios, i.e. with the large mixing desk in front of a large pane of glass - it hardly looks to be an ideal listening environment.

So I was wondering...

- do Sound engineers listen to the finished master on a TOTL hi-fi system having a more "normal configuration" i.e. like many of us have in our houses, to ensure their end product will sound  just as they want it?

- or is the studio a near field listening environment, which is actually better for the purpose of creating a grander sounding master?

- or are the speakers not really for mixing purposes because the sound engineer relies solely on headphones to create the final product mix?

Just curious - Cheers - Steve