Why?
This is a legitimate, but deeply opinionated "why". You employing me and me working for you is a business transaction. Why should I care about your mission beyond giving enough 'care' to produce great work that helps you run your business, run it well, so much that you'll want to keep the relationship going, but maybe provides me with some learning opportunities and skills that if we part ways, I don't starve looking for the next opportunity.
That's it.
I don't care about whatever your mission was when you started the company, I don't care how you think you're saving the world by creating another conference call platform. In my 22 year career I have deeply truly cared about one company that employed me. One. And even then, it was still a transaction: we need your skills, I have those skills, let's trade and do good work together. That's all I need to 'care' about, IMO it's all the employer needs to 'care' about.
Caveat Lector:
---
Maybe I'm jaded looking at a tech industry that doesn't seem to have a damn clue what it's doing when it comes to hiring, disaffected by all of these bullshit job requirements that are as far removed from reality as Earth is from one of Jupiter's moons, and offended by these job interviews that feel less like conversations and more like I'm trying to outwit a power hungry DM during a game of Dungeons and Dragons.