Obviously it's avoidable if Zimmerman lets the cops do their job and investigate the call after he makes it.
Zimmerman pursued because he was tired of "these guys always getting away." He escalated it and caused the rest to happen.
It's not hard to take the police report that says it was ultimately avoidable and understand what that means. It's not Zimmerman's duty to chase after someone he thinks is suspicious.
There is no game to play about it. This is just you trying to blame the one who ended up dead.