That isn't "not being yourself" unless you refrain from discussing those topics even when it might be called for. In my roughly two decades of experience working in academe, I have not suffered negative consequences for speaking unpopular opinions when they are relevant, nor have I ever seen someone suffer the same.
But, if in every meeting I attended I went on a rant about how 4-year colleges inflate student debt for marginal gain and future earning potential (yes, the issue is more complex than that) then I would be labelled some flavor of asshole, unprofessional, etc.
However, consider the context of admissions standards and policy for the institution. It would not be inappropriate to discuss aspects of that idea. How some segment of our population may not be good fits for the institution or 4 year college in general, that they would be better served by some other path of advanced education and job training, and how it is part of our job to set students on a good path rather than chase tuition dollars that put the student in debt for no likely tangible benefit. That would be appropriate to do, and in fact I do this on a somewhat regular basis, backed up by rigorous data analysis (my own area of work) from both my own institution and national data, when we are setting enrollment goals and other related benchmarks.
It's also been perfectly fine for me to discuss other controversial/unpopular opinions with colleagues outside of meetings during non-work related breaks or side conversations so long as I do so respectfully. Roughly two decades of steady career advancement would indicate that none of this has hurt me professionally: I have literally never failed to be awarded a promotion I was seeking, and quite contrary to negative consequences I have developed a reputation of speaking honest, unvarnished opinion backed by solid evidence.