This is an interesting case. I got hung up on the beginning of the story when the HPU called interference in the batter. I see this a lot in HS (and younger games). One of the reasons it’s a decent risk to try and steal 3B when a RHH is batting is that the C needs to throw around the hitter. It’s not the responsibility of the hitter to move and give the C a clear throwing lane to 3B. The batters box belongs to the hitter - just like the base path belongs to the runner. I see a lot of IFs that obstruct the path of the baserunner and try to make it look like an “accident” and I (almost) never see it called.