Ask IH: Idea validation - audio course platform

I'm refining a projet idea and would love to have IH community's feedback.

I saw that there are a lot of online learning platforms. But most of them are video based. Even when the content doesn't necessarily need it (marketing, motivational, ...)
So, I'm thinking that creating a platform to create / consume audio courses can have following advantages :

• The student will have courses that can be consumed more easily. During their commute, gym, ...
• The maker will have "less" work that making videos.
• For both side, the possibility to work on a more "personal" medium can enable new ways to teach / learn (learn with voice assistants in the future?).

Does that make sense?