Sony OWNS PD, not just it, they are activally working in the car in many ways, even in the car sound system
Now, imagine you are from a car company and they ask you to scan your car and check all potentially secret data knowing they activally working in a rival car, it doesnt bother you at all?
No, because Sony’s mobility division making a car has absolutely nothing to do with my car being scanned by PD who are responsible for developing the game (Sony only exists to fund PD and publish Gran Turismo, the most involvement they would have would be giving influence into what kind of direction and sales figures they would expect such as Gran Turismo going live service, in line with many other Sony titles)
If Sony wanted to get data on my car they would just simply buy one themselves and do a tear down lol
Also, PlayStation is under Sony Interactive Entertainment, who have nothing to do with the Afeela project with Honda because that’s being handled by Sony Mobility, a whole different entity that’s a separate subsidiary. They wouldn’t be involved or see anything at all that’s related to Gran Turismo, unless if Polyphony has a specific project for gran Turismo that could be handled by Sony Mobility, that has to do with their expertise. And even then, their scope of work would only be that very specific thing that Polyphony wants help with. They wouldn’t be seeing anything special secret confidential info about my cars
That’s not to mention other things such as:
Corporate firewalls existing to ensure that only relevant people and parties know information that’s necessary.
NDAs are a thing.
And Polyphony has a proven track record when it comes to handling secret info about cars that haven’t been released or revealed yet through partnerships. Breaking that reputation and trust by leaking info to a completely different subsidiary would be a really stupid move and not worth it.
Also, Polyphony is only working on the fake sounds for the car. I don’t know where they would have the potential to leak any secret info through working on programming the sounds for the car