> Does it fly in the face of the configurability

Probably not.

> or minimalism of vim?

I'd have to say at least a bit? Which is totally fine if it works for you, but there's gotta be some amount of extra features added after which "minimal" stops being a good description.

Edit: Although, we should also acknowledge that minimalism is a sliding scale. Compared to plain vi, vim is bloated. Compared to a full blown traditional IDE, lazyvim probably is minimal.