Yours is a good point, but you are up against the top scorer in the league, so much about the team is unknown, but Mart is not.
I understand the choice is about what to focus on, and what to leave as vulnerable, knowing it's often hard to just address every strong point of a team. Kind of like UConn last year let Edey eat and focused on shutting down everyone else.
For the second game in a row I just saw nothing, no help adjustments, no double teams, just straight up guarding him like you do everyone else, no significant effort to cut passing lanes to everyone else if he got the ball either (let him eat but make everyone else's job harder). I see more of an effort to not help on Berry than anything with Martinelli for the past two games.