Before you s*** on Biggio again, you might stop and realize they moved Biggio to 3rd this year so they could sign Semien (who they clearly have an agreement with to keep him in the middle infield). Biggio didn't bitch and complain, he moved to 3rd as a team player. He's injured his throwing hand on 3 separate occasions so far this year, acknowledged he isn't 100%, but is out there doing what he can to help the team win.
The reality is in today's game - great defense isn't as impactful as it one was (refer to the article on the Reds). Obviously this FO thought it was worth the potential downgrade on our 3rd base defense to get Semien on this team. Maybe they think Martin will be here by mid season, or at least by September and thus this is just a short term fix (in all likelihood - Semien is gone next year and Biggio's back at 2nd). These are all calculated risks. There's always a chance they don't work.
I think the team is 100% committed to playing Bo at SS all year. We don't really have another options (short term or long term) unless we want Espinal as a starter.