Buying parts for a Framework will cost more than parts for a $400 laptop of which there are thousands on ebay of every single part. For example let's assume the screen is broken and we have a $400 laptop which can be replaced on. A new screen is about $100-150 (based on a quick ebay look of $400 laptops). A new screen for a frame.work is $180.
Your ONLY option with a frame.work is to buy through them at the moment, there is no other part providers. You are at the mercy of frame.work to provide support for parts and supply.
With a $400 Lenovo a quick ebay search can provide you every single part from all over the world at a variety of costs. As well as the normal companies that provide parts for them (and Lenovo themselves).
I would be disappointed in framework if they locked out 3rd parties from selling replacement parts. That's the whole point of right to repair.
My hope is that if people rally behind a platform like this, it will drive the price down too.
There's also the fact that we currently aren't pricing in the cost of e-waste, much like how gas in the US doesn't currently price in the cost of climate change related damages. It could be that those $400 laptops are artificially cheap for now, but once you start charging companies for planned obsolescence, it doesn't make financial sense anymore.
Strangely, its easier to get money for purchases than have a repair budget, but that US government funding for you.