I think this could lead to the tests getting harder to reason about over time because individual test size will just grow (many iterations of deleting the simple test in favor of a more complicated test that also asserts the simple things)

and if you start simplifying the more complicated test later, you may not realize that you're accidentally deleting checks that don't exist anywhere else other than incidentally here. So it's less clear what's important without thinking it through each time.

now all that to say I don't think it's strictly that big of a deal either way - there's always tons of room for taste that can make one or the other way better in practice. But that was my gut-reaction when reading your comment.