Perhaps because there's a lot of breathless press [1] about Bitcoin solving this "impossible" problem that was in actually solved decades ago?
[1] http://nonchalantrepreneur.com/post/70130104170/bitcoin-and-...
[1] http://nonchalantrepreneur.com/post/70130104170/bitcoin-and-...
Bitcoin's solution is a pretty good one for its use case. Most other solutions would have trouble scaling like the blockchain can, but in many applications its very long consensus lead time would be unacceptable.