What really is a artistic license?

I agree, it really is a *psychotically *complex topic that i think many ignore as nothing important has hapened.Ive never heard of a indie geting sued for such a situation.And i have been thinking,lets look at mobile phones today.Most, shape and look wise are identical, but we dont see companies sue each other.

Or airplanes.Place together a boing,airbus and the others, remove the logos and they all look similar.Also when someone sells a model and places a royalty free sertificate( even if it may not be 100% true) the fault should be placed on the seller or the page that accepts the models (and is obligated to check)and not the final client if im not mistaking?
I see a good ammount of real objects on the epic store that are advertised for commercial work too, so even Epic doesnt care?

The more i try to understand it, the more I think this situation is a black hole that probably no one has explored because of mutual/ personal interests.
And maybe it should be something best left alone?