Most people are probably holding QBs, not streaming.
However, streaming QBs can definitely be a viable fantasy strategy if:
your league is small and the QB you drafted needs some filler weeks.
your league-mates draft their QBs too early (so you will miss the top 10ish options while you strategically bulk up in flex positions),
your bench size is big enough to let you keep another QB e.g. for next week.
Here is a previous analysis I made of QB streaming to support the above.
And Disclaimer to the support for streaming: 2021 was an exceptionally poor year for QB streaming.
Tagged underAccuracy , Current Season , Expectations