It’s all about the cost. The shuttle was not cost effective and SpaceX is supposed to make money.
Plus I don’t think we ever lost a capsule on re-entry, IIRC.
Capsule? No. A Shuttle? Yes (Columbia).
4 minutes out from beginning of de-orbit sequence start.
We haven't. Gus Grissom did at least have the decency to lose his capsule after splashdown however :-P