Accepted for a PhD, only want to earn a Master's

This may be true at some schools or in some programs, but almost all of this could be wrong in others. In my department, terminal Master’s students and PhD students enrolled in the same exact classes, although the PhD students may have needed a few more total credits. Whether you intended to get a MS from the start like I did, or whether the MS was your consolation prize for an ABD, you still got the same exact same degree on your transcript. Professional career advice for terminal MS students was non-existent, except to see you graduated on schedule. If you wanted a summer internship, the department wasn’t going to help you find it or even suggest it was necessary. As a funded RA, I was responsible for research 20 hours/week just like the PhD students. There was very little difference in being a terminal MS student and a PhD student in their first two years of the program.