I so feel you! And have complained about exactly this: Plan Builder: Please Stop Freaking Out Over My Vacation
Eddie gave an answer which was (paraphrased): We hear you, you can manually adjust, Planbuilder is not able to do this for you at the moment…
I think that‘s my main issue at the moment: The AI is not smart enough for certain things, but is not a great tool to help someone individualize their plan and training.