Goro's answer will not change the answers of the hundreds of other med school interviewers out there. I think there's a good chance that many interviewers at many schools will be asking questions like the one you proposed. I certainly would have if I was still interviewing at my alma mater, and knowing some of the interviewers at my school I'm sure they'll ask similar questions.
But as I mentioned, using the example you gave - it's not about getting the "right" answer, it's about how you express your answer and how you wrestle with the question. For pretty much any ethics/policy/current events question we ask, there are reasonable arguments and reasonable people on both sides. If there was an obvious "right" answer, there would be no point in asking the question - like you said, most people recognize what the "right" answer is and give it, even if it's not their actual opinion.
To give a more concrete example, the answer you gave above is fine with a little more detail. Examples of answers from both sides:
-I would tend towards continuing lockdowns until we see consistent declines in case counts, deaths, hospitalizations, etc. and until we have adequate resources built up to respond to the pandemic. I do recognize that continuing lockdowns have significant impacts on the economy, mental health, and our education system, among other issues. I hope we can try to mitigate these issues by increasing access to mental health services via telehealth, supporting options for at-home schooling and education, and ensuring adequate protection and safety planning for activities that have to be done in person. But I think the risks of allowing COVID to spread unchecked would result in a lot of similar issues, if not even more so, so in my opinion it's worth continuing these restrictions.
-I think we should start re-opening schools and businesses. The economic, mental health, and educational consequences are just too great to continue the lockdowns. With that said, I can definitely see the risk of worsening the pandemic. And I think it's important that we emphasize that this isn't a return to normal - we need to continue implementing universal masking, social distancing, affordable testing, reasonable sick leave, and other policies to reduce the risk of spreading COVID. But I do think there are steps we can take to work towards safely re-opening things.
Obviously, this is an n of 1 and I'm a bit biased since I wrote the above responses, but I think either would be perfectly adequate answers. You state your position and rationale, acknowledge and address the valid arguments of the other side without demonizing them, and you're good to go. The interviewer may push back a bit or ask you some follow up questions, but generally that's done to assess your critical thinking/ability to think on your feet and not because they disagree with you necessarily (I've def done this to applicants whose opinions I personally agree with).