And I can manually create a container with cgroups, namespaces, seccomp, etc...
But I still prefer a management tool on top like docker/podman/rancher.
Having used both manual wine prefixes and Bottles... I quite like Bottles and keep using it.
Your comment has serious "But dropbox is just rsync!" vibes. The ease of use is the point.
And at least Bottles does ease of use without losing too much control, unlike some of the very "game" specific tooling like heroic or lutris.