That is the classical model of how businesses work, but we live in strange and complicated times. Today, a product gets discontinued if it doesn't make money and executives/shareholders lose faith that it will make money in the future.
Amazon.com, to name the obvious example, ran for many years on big promises and shareholder hopes and dreams. Founded in 1994, did not turn its first quarterly profit until, I believe, 2002, and didn't show an annual profit (a small one) until 2004.
All of this is to say that it's entirely possible that Discovery is a financial failure but shareholders believe it can be fixed and earn a ton of money, and so they are doubling down rather than cutting bait.
Of course, it's also entirely possible that Discovery is a financial success in its own right. Based on the very limited evidence we have so far, I'm inclined to believe this. I find V'Ger's case persuasive in broad strokes. But the more pessimistic explanation cannot be ruled out.