Yes, let's bend over for every vanity project. To hell with any other important tech issues that arise.
Just because someone managed to blag their way to senior management, does not mean that they are qualified for the job.
Undertaking major changes to core systems on the whim of a boss is risky and sets a dangerous precedent.
I agree that the changes are do-able but if they don't want to engage in a proper project plan then be prepared for them to throw you under the bus the first chance they get.