You just scrutinized The Fourth Hokage of the Leaf for using a Tobi statement in place of a madara statement, and now you are using a statement Tobi made about madara and take it as a fact about madara.
And this statement doesn't even imply that he lost on purpose. It just says that despite losing, he still won the battle in the long run.
Sasuke explains that sharingan is unlocked by a select few of the uchiha clan, meaning not nearly all of its members, more like the minority.
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Not saying that there are other Senjus that have power to rival EMS uchiha, but they all have the potential to grow that strong without sacrificing their clansmen, however uchiha's need to kill at least 3 in order to gain an EMS, and one of those being an MS user.