In my country, it's becoming more customary to have some kind of business-related courses in arts programs. It's quite limited and I can sort of see why. Firstly, there's the argument that if you go for an arts degree, you've decided not to go for a business degree. In business school, we don't teach art, or physics, or chemistry, although any of those might be useful somehow later in one's career. There's always the choice to what extent you're going to include content in the curriculum that's not central to the topic, and the decision is generally to keep things focused.
That's not a matter of making money from attracting students; there's no real argument why students would not be attracted, or less so, if there would be one or two business topics in a curriculum. It probably has to do more with lack of trust with faculty and administrators that it will be actually useful - and if it is deemed useful, there's the challenge of tailoring such content to this particular audience, attracting suitable lecturers for it, etc. It's quite challenging to get this off the ground in a sensible way. For instance, offering an accounting course to arts students is virtually guaranteed to be a massive failure. It's the same as the mainframe programming courses that were offered to students in e.g. linguistics back in the late 1960s (yes, they actually did that - and yes, it was a massive failure, obviously!) Sure, there are ways to make it (sort of) work, but it's a lot more challenging than taking Accounting 101 from the first semester of Business Administration and plugging it into the second year of a BFA. There's a lot more I could say about it, but these are the first things that pop up with me based on my experience teaching and designing courses in higher education.
In principle though, there's definitely merit to your idea. But there's also merit to the idea of offering these students courses from the domains of Information Management, Philosophy, Linguistics, Physics and a host of bordering fields. You can't do all of that, obviously.