Unless Niko Tiliopoulos’s sacking is defeated, it will set a precedent for use throughout the tertiary education industry to victimise and sack educators who refuse, for critical health reasons, to adhere to the intensifying “return to campus” offensive.
Most professors at the caliber of his institution don’t teach undergraduates, or at least don’t do so very frequently. If his workload is like most professors, his primary job is research, with mentoring PhD students and service to the department/college/field taking up the remainder of his time. Instructors and teaching professors are hired to teach undergraduate courses at major research universities. His Google Scholar shows he has still been publishing, so this was probably political:
https://scholar.google.com/citations?hl=en&user=byo302gAAAAJ&view_op=list_works&sortby=pubdate