Somebody's got a case of Chesterton's Fence. They doesn't understand what MCP's for or how it's used, but they find it mildly irritating or unhelpful, so they demand it be removed.

MCP is an abstraction for remote tool calls with a standard interface. More specifically it's for when a local CLI will not do, and you want determinism and standardization. It also avoids all of the potential errors and guesswork involved with a model trying to "figure out" how to do something; you simply make one standard call, and the remote side "figures it out" for you, without failure.

If you can do what you need to do without MCP, then don't use MCP. When you eventually get sick of AIs playing guessing games with local tools/data, or spending lots of time to get functionality somebody already published as an MCP, or you need isolated control over the execution, maybe check it out again.