Ask HN: Is the future everyone having 100 MCP processes running on their PC?

Some things I don't understand with MCP vs. CLI

Permissions: you can already scope CLI command permissions

Discoverability: you can already discover commands/arguments with a help flag

Why add a whole other process to the computer?

Do MCP proponents imagine in the future every program on your PC has another MCP process also running?

It seems like adding extra complexity/moving parts for not much benefit.