[cnlevy]

You're right; I meant to refute the following point: NASA nixed the idea of propulsive landing for Dragon 2 for this reason (safety)

It wasn't because of safety, but because it would have needed tests, development and certification (for a new type of landing) while already having an established method (splashing into the sea).

[wat10000]

In other words: extremely difficult to make safe.

[dontlaugh]

So, safety. Every vehicle is unsafe until proven sufficiently safe.