If you think morality is just a question of taste I find the idea of you being your institute's ''go to man'' on ethics rather alarming.
Firstly I have never said I am
the ''go to man'' on ethics, rather I am one of the ''go to people'' on ethics, as I've been involved in research ethics for nigh on 25 years now, currently as chair of one of our ethics panels. I also have a masters qualification in the topic and teach medical ethics at undergraduate and postgraduate level. So yes I am a ''go to person'' amongst others and my expertise and experience in these matters is, I believe, highly valued by my institution.
I have also never said that ethics (or morality) is a matter of taste, but I would argue very strongly that ethics is not a matter of objective reality, rather it is a subjective matter and what is considered right and wrong in an ethical sense fluctuates over time (which wouldn't be the case if right and wrong were objective matters).
So a good example is the shift in the primacy of principles in medical ethics from 'doing good' on the part of the medical professional (beneficence), which would have been considered the key plank of medical ethics in the early 20thC, to patient decision-making (autonomy) as being the primary ethical consideration which trumps others in most cases. That reflects a subjective shift in thinking over the past 80 or so years - there is no fundamental objectivity in arguing in favour of one or the other.