Why Are Permissions Enabled Globally and Not Per Dependency?

I've been trying out Deno and built a small project. One thing heard about Deno was the control over what a package can do on your system. However, after going through the docs and experimenting, I noticed that permissions can only be enabled globally for the project. Is there a way to allow specific permissions, like file system access, for just one package? It feels a bit confusing because in my small project, I already need to allow three permissions, and I’m tempted to just use the -A flag for convenience. Could someone clarify this for me?