(US centric viewpoint) When it comes to text books, larger states and larger universities should at least make their basic/common course texts in-house and free to students and staff without any DRM or convoluted access methods. You should be able to download the entire "book" as a PDF. I attended a university where all their core math books were made in house, PDF only. If you needed or want to print something, that's on you.
Texas spends more than $500 Million annually on text books. https://ncse.ngo/evolution-sti...
That kind of money could surely go toward making their own digital and print textbooks much cheaper. Many public schools only buy "classroom" sets because making sure every child can take home a textbook is too expensive. On a side note, many schools no longer let student use lockers to store items, so book storage is also a problem if every student is expected to manage 6-8 books. I also believe textbook costs tip the scales of "no homework" policies. Furthermore, it is deal dependent whether or not you can photocopy consumable materials so you don't need to repurchase entire workbooks at 10x the price of a photo copy.
The only "added value" I see in the corporate publishers is they may come with proprietary web portals to serve "enhanced" content. Digital access commonly does not last as long as a school may keep a textbook.
An especially egregious textbook publisher tactic at the university level is to require school work be submitted digitally and the access portal can only be accessed with an key from a new, current edition textbook. They even go so far as to invalidate unused keys from previous editions (some only 1 or 2 years old) that were not used.
I can see a case for specialty texts, but that's about it.