In an ideal world they shouldn't have to, but in the real world, it makes it easier for enterprises to adopt without friction. Adopting three tools is a threefold bigger challenge in enterprises, but thinking about it as a single tool makes it more amenable to enterprise adoption where it's needed the most. The merging I suggest is only logical, more like a bundling.

Hmmm, I've never seen that and I feel like I work with some pretty locked down companies.

If you can get whatever you want into a production workflow, then it's not really that locked down, is it...

If you can get uv in, ruff should be easy...