This was a Critical Mass event, which is why the bicyclists are taking up all of the street as a way to reclaim the streets and protest the lack of safety for riders under usual conditions. It’s not legal, but protests are never useful if they’re fully legal now, are they.
That’s literally what happens in parades.
So if a bunch of street racers drove in all the lanes you would be fine with it and call it a parade?
Street racing is not a political protest.
Please keep in mind that arguments made in bad faith are uncivil and thus subject to removal under rule 1.