“I suspect a lot of it is simply that Bayern are better operators than their competitors and now have their very effective modus operandi down to a fine art.”
It helps when you can count on the top Germany players wanting to eventually play for you. It isnt difficult to be smart and just wait until you get a free transfer, or can force a move through before that, if needs be.
The 51% rule protects things like full stadia in other clubs but it also protects bayern, as the linked video, or another video that I watched discussed.
So clubs refuse to sell, they wait and get them for free. This is fine in a one off situation but it is a constant threat, in the same direction, it is tedious.
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