I do. I have a few VLANs and subnets at home.

Docker Compose creates a new network for every project, and eventually overlaps with something important. They are fairly large ranges by default, so you end up taking up a lot of address space fast if you're not careful. This is especially wasteful because some of the Docker networks only contain two hosts, but are (from memory) a /24 or maybe even a /20.

Easier to handle it manually.