I think the danger is in thinking that streaming providers have everything and are incentivized to show you everything.

e.g. When you pull up an auto-generated playlist or look at recommended suggestions, are you just looking at content which the provider prefers to show you? Can you trust reviews from the same company that's selling you the content? If some content isn't on there, will it just disappear into the abyss? If the provider decides to drop some content, will you ever see it again?