Why? If that would be the case they would only sell in the higher price tier. Currently, the more expensive product covers most of the R&D of the cheaper product.
Most user doesn't care about repairability. I don't see a lot of people buy the Fairphone. They complain about John Deere but don't look for alternatives. They always chose the cheaper alternatives.
If we could somehow separate the development cost and the manufacturing cost, we could get super repairable hardware. Just like with OSS. If someone sponsors the development the product is great otherwise commercial software wins.
The market will always steer everyone to the lowest common denominator and as a result fails when the externalities of pollution and e-waste are concerned.