Battles have been fought over dumber things. Writing system-critical code in Mathematica is probably "a terrible idea" for most applications that don't make enough money to justify paying for a license. For the people who do pay for that license... don't they reserve the right to complain about "multiplication with multi-dimensional arrays"?

Neither of you have to be wrong, but insisting that Wolfram isn't liable for the situation isn't right. They built the moat, now they have to deal with people falling in on both sides.