imo solid tabletops are much better for pizza making. i’ve worked at a few places and in practice those pans get ACTUALLY cleaned much less often than a regular ass table does.
Realize that "clean, sanitized surfaces" is a VERY relative term in foodservice. Also more times food is handled, more chance of cross contamination. The gloves/hands that put that cheese back in the have supply may have just handled sausage/deli meats or underwashed tomatoes containing listeria, now your cheese had extra "flavor" potentially. More of a risk in scenarios where the food isn't then reheated above temp that kills bacteria.
Basically, ideal path is ingredients prepped in sealed/clean factory process, handled once from safe storage into your meal with clean gloves
The pizza is already on the filthy surface so you already lost out on that.
If it is a place with a small menu then it really isn't THAT bad. It can get grodey over multiple days but hosing down the surface at the end of the day is generally a thing. Especially since that is getting tossed in a ripping hot oven shortly after being dusted.
The issue is when you start considering food allergies and dietary concerns. Two pizzas that go dough->sauce->cheese->other toppings isn't THAT bad, unless you are dealing with allergies related to the different sauces. But if a place puts a dusting of cheese on top of the sausage or pepperoni and someone else got a vegetarian pizza? Or if someone has a pineapple allergy.
I would argue that anyone who would be deathly ill from even trace amounts shouldn't be there in the first place. But it is still a dick move and can lead to that "something I ate" issue for mild/moderate reactions.
From working at a pizza joint as a kid, I can tell you that most surfaces are sanitized at the end of the night and covered with plastic wrap so we could start fresh in the mornings.
To be fair, from a food-conservation standpoint, I’d expect cheese (and other materials) to be re-used. No need to throw it away just because it fell on a reasonably clean surface, especially prior to baking.
They shower the pizza with cheese, and any cheese that doesn't land on top of the pizza is collected and used for the next. Pretty standard practice when making food