there definitely are some areas in software-land where graphing data and/or directly eyeballing it genuinely helps to spot patterns where statistical methods might be cumbersome/tricky/otherwise annoying, like log analysis[1]
[1] https://jvns.ca/blog/2022/12/07/tips-for-analyzing-logs/
Every MCP vs CLI argument I've seen really glosses over _where_ the agent is running, and how that makes a difference. For individual users where you're running agents locally, I totally agree that CLIs cover the vast majority of use cases, where available.
I think something I've not seen anyone mention is that MCPs make much more sense to equip agents on 3rd party platforms with the tools they need - often installing specific CLIs isn't possible and there's the question of whether you trust the platform with your CLI authentication key.