This is just not true at all - but your last point is the most important
horrorshow, I took the mcat 3 times (went up each time), got 6 interviews, and not once did an interviewer even mention my mcats (not my scores nor the fact that I took them 3 times- and i got a 28) -
interviewers are not going to look down on you if you take the test and improve- thats what its all about - working hard, and doing what you need to do - i never asked for a pity treatment nor felt like anyone gave me one. If anything, by virtue of the fact that no one said anything, I proved to the committees that I was dedicated and determined to gain acceptance - I knew the risks, did the work, and improved each time - maybe i couldve studied right the first time and not had to take it over, but who cares. In fact, most secondaries only have room for your last two, so i doubt many of the schools even saw my first one.
i think the drawbacks to taking it multiple times is that its a waste of time - it delays your plans, and makes you have to endure the test that many times - but you have to remember that these adcoms and interviewers are normal teachers - they want to think highly of you, and they went through the process themselves - if you show them that you can do the work and are confident in yourself, then it will come through
best of luck