Well I harken back to my father teaching me to drive, and the little nugget of wisdom that has saved my life in traffic multiple times over the last 25 years on the road and in the air: It's better to be alive than right.
People are going to cut you off, they're gonna break traffic patterns, they're gonna drive the wrong way up the road, they're gonna drive drunk while doing lines of cocaine off the ass of the prostitute they're murdering, and you can list all the crimes you saw them do to the ER staff as they try to stop the bleeding around the steering column sticking out of your chest. You have a duty to yourself to steer around the jackasses.
It looks for all the world to me that Bikey Mikey is pulling some Karen-esque move blocking traffic to assert a cyclist's right of way or some shit. He might have gone on a bike ride tomorrow if he'd just pedaled away. He had a chance to de-escalate the situation, which he didn't take. So he took a street to the dome. That guy's going to prison, that guy's going on a respirator. Was whatever point he was making...worth it?
I get the feeling he chose to incite the incident. He chose to be in the way, he chose to stay in the way. I don't give the first two half-flaccid thrusts of a reluctant pity fuck if he deserved to have his skull caved in, it wouldn't have happened if he hadn't incited the incident.