Seems like there are a few things you're forgetting.
1) Lobbyists aren't often found painting road markings on streets. The SLM symbol was adopted only after considerable study by traffic engineers including experimental placement in a number of trial locations where the effects on safety, traffic flow, and public acceptance could be studied. The required placement out in the traffic lane was found to be the optimum location so unless you've done an equivalent amount of study on your contrary preferred lane position you might want to reconsider.

2) In the OP's video it's quite clear that in fact there was no impediment to other traffic since there was a second lane available and only occasionally did a motor vehicle use it to pass the OP. If there had been a line of traffic forming behind the OP there would have been a steady stream of vehicles passing him in the lane to the left. The video doesn't show what was behind the OP, but I'd expect that the only time anyone would have followed him would have been if they planned to make a right turn - in which case following the cyclist is far preferable to just barely passing him and then cutting him off with a right hook.

3) Sharrows are not just placed randomly on assorted streets but instead there are specific guidelines. When those guidelines are followed sharrows are placed where they function as depicted in the OP's video - on streets where the right-hand lane is too narrow for cyclists to safely be in it alongside motor vehicles that also remain in that lane and where traffic flow and safety will be best if cyclists position themselves at about the sharrow distance from the curb.