Hang on though, what the OP is suggesting isn’t wrong at all. The wing only becomes active on a certain part of the circuit (which is a straight), so feasibly every lap each driver could hold down the button on that section just in case they are allowed to use the rear wing. The OP isn’t saying that a driver would hold it down through somewhere like Turn 8 istanbul because it isn’t active during this part of the race track.
In a sport where fractions of a second are what gives you track position, I can see drivers wanting to make the most out of the rear wing speed boost – because the reaction time of a second or so when the light comes on may mean that they don’t carry enough speed to be able to pass.
There will be times when they don’t want to activate it though, but when they do surely the OP has a point, that drivers will simply mash the button until it works