But what about mark levine
Mark Levine is a fine jazz pianist. He's not any kind of authority, though. Just some guy who wrote a few books based off some idiosyncratic ideas -- show me an "alt scale" being used in practice, and I'll revise my opinion.
Nobody important conforms to his theories.
ETA, at least I can say for sure that his "alt-scale" theory isn't used by Wayne Shorter, Herbie Hancock, John Coltrane, or Joe Henderson, or Dave Liebman.
If there's an unaltered second or fifth, it's not an alt chord. By definition. Just doesn't happen. It's a perfect example of someone inventing a problem in order to swoop in and save the day. Well, good for everyone, music isn't some "problem," unless you want to convince people to buy your system.
In addition, it's not part of the bebop tradition, which is obvious because any jazz player does his or her own transcriptions, and doesn't read out of some ridiculous "Omnibook" for rubes, or whatever.
For actual theory-minded people -- which should be everyone -- Bert Ligon still has his good, Schenkerian-style books on sources of chromaticism in linear improvisation. As far as anyone knows, actual music theory done by professional analysts still survives. Mark Levine is a good pianist, with a real knack for Latin rhythms, and I hope he continues to thrive into his platinum years.