On the surface it may seem that way, but you can put whatever premium you like on a skateboard or battery pack.
Yes. The same power trains are sold at very different margin levels when sold as part of cars
of different brands.
LikeBentley has done with the W12 engine that it used for both the VW Phaeton and the Bentley Continental.
Or as Aston Martin does with the powertrains it buys from Mercedes for the Vantage (they are AMG powertrains found in the likes of the C63, & G63.
Or think of the common chasis that underpins the Porsche Cayenne, Bentley Bentayga, VW Touareg and the Lambo Urus. - but all at very different price points.
BMW 7 series and the Rolls Royce Ghost is yet another example at very different price points.
There are tons of examples of this in the current ICE age - makes sense to extrapolate it to the EV age.
For the Tesla it could be very profitable to sell skateboard with powertrains downtuned via their software to be 10% less power, for these lux auto makers to design the next Bentley or Lambo on. They could pay Tesla a healthy profit for each one or better yet they can build their own factories to build Tesla licensed powertrains and skateboards and pay Tesla a healthy royalty for the right to do so.
And because they are in the lux business, and could charge more for each of these anyway, and the excess amounts they pay are not going to impact sales for the lux legacy automaker.
They may also view this as cheaper than what they think is "reinventing the wheel"
Combine this with a royalty fee for supercharger access - and this becomes a profitable means to introduce yet another profit stream to monetize Tesla's R&D - AND advance the mission.