Oh, cool! An antitrust violation epitome!
It could be if they were the only one trying to offer this, but because it's so expensive, there are always multiple competitors trying to pick off their users. And when the next round of corporate cost cutting comes, they always come for the Bloomberg terminals, trying to push something cheaper.
But the cheaper alternatives are always inferior too (never mind the decades of muscle memory on Bloomberg).
Despite the price Bloomberg has maintained its number one position. I think in no small part that's also because their customer support is absolutely excellent. Press F1 twice and you're in a chat with the helpdesk; these days the initial query is triaged by AI of course, but for actual issues you're talking to a real human in less than a minute (sometimes just seconds), and these real actual humans typically have the expertise to help you. If not, the higher levels of support are good too. Don't underestimate this aspect!