Because the transmission is not listed on the service schedule as BMW says it is a lifetime fluid. BMW doesn't say what they consider lifetime to mean; until the trans fails? Until 100k miles? 200k miles? They don't say and this is why it was never changed. How do you know BMW never said that to thew owner? You just can't assume that if it was never listed that it never happened. The tech could have put the car on the lift and had the SA call the customer. Customer say, nah, don't worry about it. I would not expect that to make it into the service history.

For the drip, same as above. You always get an independent inspection done and then you are not assuming anything. You made assumptions and a decision based upon those, it was you that did this.

What does "world class inspection" entail? Maybe it is check the windshield washer fluid, air in the tires, tread depth and coolant level. You are once again making an assumption what "world class inspection" means.

A lot of times, service records are for service performed, not problems reported by the dealership. If you get an oil change, an oil change is listed but that doesn't mean that the tech didn't find something, told the SA and the SA calls the customer. if the customer said don't worry about it, that entire train of events could not be listed in the service record.

BMW NA will tell you that you are not entitled to those records. A dealership might be willing to give them to you but that would also be against what BMW NA wants. You have already bought the vehicle and there is nothing in it for the dealership to provide you with that information. You can always ask, but if they say no, the answer is no.

You needed to get a PPI performed on the vehicle and you didn't. All of the issues you have found would have been discovered during the PPI and you would have known exactly the issues that your vehicle has. You relied solely on information that while can be helpful, doesn't show the true health of the vehicle.