> My gut feeling is that it succeeded due to escaping scrutiny.

Basically every languages mostly escapes scrutiny except from very niche corners (usually people deeply committed to other languages that aren't actually considering alternatives, but criticizing everything that isn't their preferred language for not being their preferred language) until it succeeds, because there are enough of them that basically no one cares to put the time into scrutinizing them until they achieve a critical mass.

That's not why Python succeeded against other languages.