I would like to know why wouldn't it work to simply flood hospital rooms (any time they were empty) with lethal (for bacteria) doses of non-ionizing radiation (or any kind that doesn't go through walls and don't make said walls radioactive) so that those pesky tolerant strains have a really hard time propagating
Most of the transmission of infections is from human to human contact. Yes, bacteria can reside on equipment and facilities, but we have adequate measures to deal with that.
As an interesting aside, more and more copper is being used in medical equipment as it is naturally antibacterial.
