I can think of plenty of reasons why one would choose a DO school - especially a wonderful one such as MSU (Nassar notwithstanding) - over an MD school. There are several in my class at TCOM who turned down an MD acceptance(s) to come to TCOM.
In most cases, I would probably have chosen MD. I won’t lie about that.
But if we’re going to be real, ya’ll are overexaggerating so hard you’d make even Reddit blush.
Going back to OP in particular, I don’t think 10k/year is a big enough difference to choose DO over MD if that’s the only reason you would do it - not location, not draw to OMM, not ties to faculty, etc. Western Michigan isn’t a particularly high-tier MD school and your mileage honestly probably wouldn’t vary much between the two of them, but, all things nearly equal, I’d probably choose W. Michigan.