With decades of experience as a Parts Manager at new car dealerships I could not begin to count how many times I have been asked by a customer “Can I install that myself?”. It is such an open question it is hard to answer.
Unlike many aftermarket accessories, genuine auto accessories are designed by the manufacturer to precise and exacting specifications to easily fit the specific year and model of the vehicle it was made for. Many aftermarket accessories are made to apply to as many different models as they can for a broader range of coverage.
That often means many non-genuine accessories “kind of” fit a lot of models. So with genuine accessories you do have the advantage of the product being easier to install because it was usually made specifically for that vehicle.