I feel real sorry for any institution that hires someone who reflects the job description that you just shared. Of course I suppose anyone with so little insight into the museum profession deserves what they get - Preparators as manual labor, Registrars as just clerical help etc....
I haven't worked for any museums like that but I know people who have. Their damage rates reflected in their approach too.
What is kind of funny though, is that when I worked for a University Museum in the Mountain Plains region the duties were insanely varied and extremely demanding - involving literally all aspects of object care. As a result I have been well prepared for other jobs both in museums and in the commercial sector. I guess it all just depends on the institution and the individuals there who make the decisions.