No, that's just wrong, if you let Adobe buy up all the design tools then you limit designer's choice to just Adobe. Will they come out with a competing product? Maybe. That's their business. But the potential is there, and Adobe has to stay on its toes and can't coast on it's near-monopoly status. Indeed, it's now also possible Figma will come out with products to compete with Adobe. And just the threat of that has the potential to limit all of the hostile behavior towards consumers Adobe has been up to for years.

Which is all to say that the market remains competitive.

If you don't think it's the FTC's business to decide whether or not that 100 to 99 move is significant, then I don't think you understand. Even if it's insignificant - it's their business to make that call. You can disagree with it, but if you think that isn't their balliwick, you're simply mistaken.