see my edit for why it doesn't matter that these 30 minute algorithmic questions do not need to be directly applicable to day-to-day job tasks

Perhaps you might consider putting that sort of effort into CSE outreach or preparing interview prep materials that are free to the public.

I do :)

A lot of people at my company do, but you never hear about this stuff because nobody blogs about a career fair that came with some friendly helpful insights from senior engineers.

Also nobody blogs about recruiters when they are super helpful and give a ton of relevant interview prep material (which ours do), partially because most candidates frankly ignore the material thinking it's not relevant.