The world is not black nor white. There are at least fifty shades of grey in between.
We can either agree with that vision and work towards it, or disagree and stop participating.
That's wrong, because there are many different ways to participate. For example, I could only answer the questions that I think should be answered or upvote the questions I think should be upvoted. A perfect alignment of my vision with the visions of other users or the platform owner is not necessary.
The same way, the platform owner could follow more than one vision. It's not a one thing or the other there either. They could try to maintain a knowledge base to some extent and teaching beginners to another extent at the same time.
Totally independent of this is that they should state clearly what their current goal is. Everything else wouldn't be being honest with their active users.
The ongoing experiment with 3 close-votes are enough will be quite interesting. I think that we will learn something about the vision of the company by the results of the experiment and the reaction from the company.