You seem to be missing the entire point.

Questionable alternatives to twitter are "alternatives" only in the sense that questionable alternative to mainstream entertainment options are "alternatives."

The entire point is that boxing matches are not questionable, while underground dogfights are illegal and not really therefore a reasonable alternative.

Nothing, boxing matches are an above-board activity, as opposed to dogfighting, that's my point. Above-board web sites with reasonable moderation standards are doing fine, and always have been.