There are people who sit through credits. We're a minority ...even in theaters, I'd say 10% or less... but, since we're _paying_ subscribers to Netflix, why can't we turn on a feature that lets us watch credits?
Personally I prefer to read an IMDb sheet at my own pace. That said, I wish Amazon had a feature similar to Amazon Prime Video's X-ray, it's so much easier to find an actor that way and especially if they only starred in one episode.