you'r making the same mistake everyone else is making, though I do think that you'r the only one that think itachi and sasuke has average chakra levels, why? because he gets weak after using the MS, lol, you're underestimating the power of the MS my friend, you think a person with average chakra level can just easily do something like that? susano'o,amaterasu, tsukyomi and such? lol. those are high-class techs, VERY high-class, and we know that it takes chakra to even keep a regular sharingan activated, imagine an MS, plus the techs I just described. and you still want to say average?
and once again, tobi said madara had exceptional chakra, even for an uchiha, lol, you guys can twist the meaning all you want and say well they mant quality, but that's not what it said.
and lol, how many times have it said the uchiha have "sinister" chakra? the only time I remember when the fox made a reference to madara. that's it.
and you want to know why it's not me changing the facts of the manga?
it says really clear "powerful" chakras, I take it for what it is, the uchiha was given powerful chakras and the senju wasn't. it's you guys who said something like: oh, well they mean quality, it doesn't "necessarily" mean they have more chakra but better chakra , or whatever you said, can't you see it's you who changed it and not me.