To address the easy part of the OP’s question: No, going to college and working is not at all what makes someone MO; it is perfectly normal for Traditional Orthodox men and women to go to college (typically a Jewish program or online) and then work in the workforce.
As to the rest of the OP: Even some MO admit, like one of their “feminists”, that NOT everything they do is in accordance with halacha.
Joseph’s post, in the other thread linked at the beginning of this thread, is well worth reading.
This is far more insidious than many people likely realize. If there were no such theology as MO and a “non-ideological” girl were, for example, to wear a shirt which does not conform to the absolute and indisputable requirements of tznius, then, if not for MO theology, at least she could understand that she is doing something wrong and then hopefully choose to do the right thing. Same for married women keeping their hair uncovered, et al.
But to give her an institutional/theological justification for doing so, that “MO does this” so therefore it’s okay and just as frum as anyone who does conform to tznius requirements, is unprecedented, and can prevent her ch”V from correcting her behavior, because “MO does it”.
This can then continue on in their families for generations and is also obviously a disaster from a chinuch perspective, Hashem Yishmor.
MO is the first known movement in Jewish history to both claim orthodoxy and at the same time to permit that which is impermissible.
There is also the very real problem of incorporating the heresy and idolatry of Zionism into their faith, which is also alluded to in that post.