Why Wikipedia's Discussion System Is a Failure

I made these two observations:

1. Very early, all talk pages were erased from any previous discussion (to my knowledge without this having been announced beforehand) and replaced with long templates that provide no information and certainly have nothing to do with discussion of the topic. [0]

2. Only a few pages still have some discussion, but then it seems to be not reflecting the scope of the subject [1].

[0] https://en.wikipedia.org/wiki/Talk:Rocket

[1] https://en.wikipedia.org/wiki/Talk:Cancer