They're still easy to repair, if you are somewhat skilled. You can't always source high quality 3rd party displays, and parts (especially batteries) and Apple is trying to clamp down further on the 3rd party parts market (what's called the "pirate parts" market)
It's all relative. It's not a very difficult repair like say, replacing a screen on a Galaxy S8, iPad or Macbook Pro. You need some skills/experience and the correct tools and then it will take 15-20 minutes. An experienced phone technician will have no issues whatsoever. A relatively inexperienced, brave individual like me can do it alone in 30-60 min. But again, not like this Fairphone.