If the device can only be repaired by having extremely specialist tools, skills, etc. then it's still repairable, you just need to invest in those things which costs $$$. But it's hardly worth doing, because by the time you've done so the next iphone rolls around and the skills/tools lose most of their value.
If the device can easily be repaired but the replacement components cost so much it's hardly worth doing the end result is the same: Devices won't be repaired because it's not financially attractive. Which is exactly what Apple wants, they're only doing this because the EU is practically forcing them to.