What am I BSing?
I have been very clear, but when you read things to try and fit your narrative I can understand that it may be hard for you follow.
I doubt that Jose is taking out PEH so if we bring in a starting DM then that is two of the starting spots taken up. Which means that only one of Lo Celso or Ndombele can start, currently if healthy both would be options to start, so one of them would lose playing time because no longer would both be considered options to start.
Plus Jose has shown that he likes to bring Winks on off the bench so whichever of Ndombele/Lo Celso did not start would struggle to be first choice off the bench as well, especially in games in which we are winning or even tied.