Most scientists either blindly accept collapse as a mechanism and then happily use the highly accurate math and don't care it isn't testable, or if they think about it at all they adopt something untestable like MWI and then happily use the highly accurate math and don't care it isn't testable. Thinking hard about testable theories in this area is incredibly slow progress and doesn't pay a lot of bills (https://www.theguardian.com/science/2013/dec/06/peter-higgs-...)