I have a Software Engineering degree from Harvard Extension and I had to take quite a few exams in physically proctored environments. I could very easily manage in Madrid and London. It is not too hard for either the institution or the student.
I am now doing an Online MSc in CompSci at Georgia Tech. The online evaluation and proctoring is fine. I’ve taken one rather math-heavy course (Simulation) and it worked. I see the program however is struggling with the online evaluation of certain subjects (like Graduate Algorithms).
I see your point that a professor might prefer to have physical evaluation processes. I personally wouldn’t begrudge the institution as long as they gave me options for proctoring (at my own expense even) or the course selection was large enough to pick alternatives.
Professional proctored testing centers exist in many locations around the world now. It's not that complicated to have a couple people at the front, a method for physically screening test-takers, providing lockers for personal possessions, providing computers for test administration, and protocols for checking multiple points of identity for each test taker.
This hybrid model is vastly preferable to "true" remote test taking in which they try to do remote proctoring to the student's home using a camera and other tools.
That’s what I did at HES and it was fine. Reasonable and not particularly stressful.