And that's the problem!

It seems people are so entitled that they expect health care professionals to significantly inconvenience themselves for a marginal reduction in transmission risk. That's just ridiculous, I'd rather leave it up the medical professionals who are trained on such things to decide when a mask is and isn't necessary. CDC guidance for medical professionals does not recommend wearing masks for every shift (though it explains that's still safe), it only recommends wearing masks while in proximity to at risk individuals. Here's the CDC guidance for healthcare workers (source control means wearing a mask):

Source control is recommended for individuals in healthcare settings who:

• Have suspected or confirmed SARS-CoV-2 infection or other respiratory infection (e.g., those with runny nose, cough, sneeze); or
• Had close contact (patients and visitors) or a higher-risk exposure (HCP) with someone with SARS-CoV-2 infection, for 10 days after their exposure

Consider reading the full thing. Also note that policies can vary by state, county, and even medical center. But the CDC guidance at least matches what I've been saying, the recommendation is to wear a mask when sick or in close contact with someone who is sick (there are provisions for other scenarios as well).

But my point is, health care providers know the recommendations and policies, and they are most likely following them. So give your care provider a break, or ask nicely for them to mask up if it really bothers you.