being close to fininshing uni in an engineering disciplin i do know a few things about the job situation in both engineering and natural sciences and unemployment is not a worry you have to deal with in these fields (not atm anyway)
even if its a hotbed research is done in universities where salaries are low and theres very few possibilities of getting promoted ... if they were in it solely for the money they certainly arent stupid enough to not get a job out in the industry which easily pays twice as much
science isnt faith based thats the entire point of it
name one of these instances then
i cant think of anything where a theory has been completely binned
theres a huge difference between rationalising and providing something that can be proven via experimentation
while there are a few conflicting theories out there all of them work just fine as long as you keep them within their boundaries
dont mistake incompleteness for failure