I think it's because it sets a poor first impression or creates inaccurate expectations. It may cause a feeling of letdown once you get in the door and see what

I think it's because it sets a poor first impression or creates inaccurate expectations. It may cause a feeling of letdown once you get in the door and see what you will actually be doing. Once, I had a position where the interview process had me thinking I was going to be doing much more exciting things than I actually did. The strange thing about it was that if I had realized that I was going to be doing that work beforehand I might have been okay with it. Instead the letdown tainted my experience there from day one and I never really got on track and left soon after. I wonder if that is what is going on here.