Given that applies to about 0% of beliefs for most people, I'd say the idea has some flaws.
If you immediately reject that, you're not very open to external ideas, are you?
If you don't immediately reject it, you see how a market can be subverted to serve purposes that it was never intended to or constructed to resist.
Either way, the idea of a marketplace of ideas is paradoxical in the extremes. And once you acknowledge the idea needs to be softened to avoid self-contradiction, you end up back at the question of what constitutes abuse. That's the exact same question people are wrestling with now. And because it's inherently an expression of a power struggle, you need to be aware of whose power you're supporting.
I recommend siding against authoritarians and fascists, but that's just my idea.