I don't think that anyone in the market has these unrealistic expectations of alts.
It's simply that alts have been significantly underperforming when compared to something like BTC, which has obviously been outperforming the majority of other alternatives within the market. And there is a good reason for that, because traders, especially institutions, prefer to have BTC which has had a better reputation and more liquidity in comparison to the majority of alts.
So yeah, nothing is wrong - but that doesn't mean that demand for alts will all of a sudden exceed BTC per se.