I have the opposite viewpoint on masks based on family working with covid positive patients over the last 11-12 months.
One has a dedicated covid unit with up to 40-45 positive patients at a time. The original nine workers in that unit have never tested positive, after 11 months of forty+ hour work weeks.
They have other PPE like face shields and gowns and gloves, but to not give credit to the mask seems unreasonable
Well and still you have the risk to catch this virus.A family member calls the person's who are found to be positive and also personnel from hospitals are among them and wearing the same equipment what you describe, so there is always a chance to get infected.