Comment by 3D30497420

You seem pretty certain of your opinion, so I doubt anything I can say will sway you.

Nonetheless, it isn't an issue of "quality" or "discerning customers". A company can earn market-share by providing a better product (or a worse product at a lower price) and that's fine.

The issue is when that company uses their market dominance to limit competition. Then it becomes an anti-trust issue. Movie theaters aren't a good analogy since they're far less central to our day-to-day lives, and therefore will have less overall impact on the economy. Nonetheless, imagine your dominant chain makes deals with film producers to prevent their competition from screening popular movies. This prevents the other chains from competing, even if they wanted to.