Do you think it is possible? :)

In general, yes. The decisive factor is only what expectations the users have...

Do not misunderstand: I think it's good that there are users who act as community curators. If they do not act with fraudulent intentions, it works.
But if the posts are written only to serve vote bots or something like that and not to deal with the posts of others at all, then the platform will not survive in the long run.

So I came to the conclusion that without rewards nothing will happen.

If the readers of your posts have a lot of SP, the authors will also receive correspondingly high rewards. But if the SP are delegated for their own purposes, other authors will have nothing from it.

I have always held the opinion that we lack authors from developed countries.

I guess the problem is that for users from such countries, the rewards are not really "worth it". The real value and the time required behind it is simply too low. So it has to be fun primarily. But these users may lose that very quickly when they see some of the activities here. That's why many initially established users have disappeared again.

Then we would see more discussions and interesting posts.

Yes, that's true. I often read that hard work was done and the SC01 still has not left a vote. I find there is already the first sticking point: The communication on the Steem should not be hard work!
When I spend the time here (and it's not just 10 minutes) to reply to you, I do it because I enjoy interacting with you or others. I don't see that as hard work. :-)

I don't think there is any way out of this situation.

It is difficult. The system exists because there are rewards for writing your own articles. I don't want to deny that either. As always, the dose makes the poison.
It's basically an old topic. Investors and authors should both have their shares, but in the current system that works rather badly.