Not really (sorry, I'm not trying to antagonize you on purpose)
The design choice is simple - let players only have one "deployment of stuff" to worry about.
Yes, it would be nice to be able to for example deploy only two turrets to get rid of some pirate and leave the rest of my guns tucked away, or deploy only a scanner, but other than adding complexity into control bindings, does it really add to the gameplay? Aside from confusing the hell out of people who are trying to figure out which hardpoint they forgot to retract.
Yes, I guess it could be called "activate external mounts" instead of "deploy hardpoints".
Firstly, hardpoints and utility mounts are clearly different things as they are separated in outfitting and from the graphics we can tell that the utility mounts don’t deploy or retract. (Not to mention that when I do deploy, the scanners are available instantly, while the guns delay until they are physically deployed.)
Secondly, other scanners work without deploying: the ones that run in SC. So it can be some global “scanners need to be deployed to be used” thing. Even the mapping probes —which are actual projectiles— fire without being deployed... because you can’t deploy in SC.
So that’s why it’s a design choice.
They didn’t do it globally, and have no trouble not making us deploy when it suits them as in the case of SC scanning.
Thirdly, it’s not to do with fire groups because, again, firegroup assigned scanner like discovery and DSS probe are activated on fire groups but don’t need to be deployed.
So what’s stopping them from making wake scanners work the same way? Nothing.
It would be a simple QoL adjustment. Deploy hardpoints is just for guns already, so just don’t tie the function of any scanner to it. There’s no need to, and all it does is make stations complain since we have to deploy guns even when we have no intention to shoot anything.
There’s no “in-fiction” reason for it. So it has to be a control design choice. And all it serves to do is grief us by making stations yell as us for no reason.