All foldables on the market are impossible to repair

False. But, it depends on the country one's in.
In the UK Samsung offers replacement of the inside and/or outside screen, whereas in Belgium they can replace pretty much everything:

Toestel					Display/Scherm	Camera achterzijde	Camera voorzijde	USB connector	Batterij	Back cover	Screenprotector  
Galaxy Z Flip5			€369			€89					€79					€69				€99			€69			€29  

Although, the older the model the more expensive the screen replacement. E.g., at €369 for the Flip5 inner screen one could as well buy a new second hand model.