from MY experience... you are not correct.
At the places I worked. One of us sales dweebs HAD to check an instrument out, look at it, tune it, and made sure it was acceptable BEFORE it got hung up, we would also tag them at this point with model info/ pricing.
Anything that was really off would be sent down to a tech. The tech would then either make it playable, OR send it back for replacement.
In our down time.. get a tuner and a polish cloth, start on the left and work to the end.
Because.. IT makes a huge difference. The customer buys with their eyes first. Shiney is better than dull. Unless it is supposed to look beat up.
Then they pull the guitar down.. Hey! It's in tune! As opposed to hitting a chords and it being massively out of tune and asking for a tuner.
Or even worse, if the A is a step off + or - and the player just tunes it to that A (especially in a loud store) ..
All of a sudden it plays like crap because you are tuning it a step too high, or it's buzzing all over as it's a step too low.
I have seen many times where it was not noticed and some kid put a guitar into some "alternate" tuning. the guitar was put back up. Then given to another customer who spends more time tying to tune than play. Gets frustrated and leaves.Especially on a busy/ LOUD saturday.
And.. from experience... you NEVER wanted to be the "Oh, let ME tune that for you" sales dweeb.. Right up there with "Wow! who is that ugly person, who let them in?"..customer " Oh ya, that's my girlfriend"..