The real crime is that Valve requires price parity when you independently (no Steam keys) sell your game on a different store, as well as the Steam store.
They don't. Only if you are selling steam keys do they require price parity and only for steam key sales. You cannot sell a Steam key for less than you sell your game on Steam for. You can sell a non-Steam game key on other store fronts for any price you want.
This is what is being alleged in court by only a handful of developers but there are countless examples of the exact opposite thing being true.