As someone who struggles shipping software that basically nobody uses, I don't know if I'd have the guts to say "it's good enough" on a project as big & widely used as WordPress.
When WordPress ships a bug, or a security vulnerability, or drastically and negatively alters the user experience the repercussions are vast and long-lasting.
I can't imagine how many man-hours and how many millions (billions?) of dollars it costs every time this happens.
I feel that this "shipment" has been fairly responsible, with the Classic Editor plugin as a fallback for people who don't want Gutenberg.