Yes, it is. If it's about how it looks, then it's illustration, not design.
> how it looks and how it works are usually two different job functions.
Again, no. If you skip functionality in your design, you will end up with an unusable product.
https://lawsofux.com/aesthetic-usability-effect/
Edit: don't also forget, that after initial perception comes the actual usage.
Yes, it is. If it's about how it looks, then it's illustration, not design.
> how it looks and how it works are usually two different job functions.
Again, no. If you skip functionality in your design, you will end up with an unusable product.