Then there are villages, which were promised fiber connections, but somehow after switching to the fiber connection made them have unstable Internet and ofter no Internet. Saw some documentary about that, could be fixed by now.
Putting fiber into the ground also requires a whole lot of effort opening up roads and replacing what's there. Those costs they try to push to the consumers with their 800+ Euro extortion scheme.
But to be honest, I am also OK with my current connection. All I worry about is it being stable, no package loss, and no ping spikes. A consistently good connection stability is more important than throughout. Sadly, I cannot buy any of those guarantees from any ISP.