Removal men who feel uncomfortable wearing masks are feeble! Compare manual hard work for long stretches of time.
I don't entirely believe masks are useless to protect the wearer. Although the main use of masking is public health I think there is a slight protection for the wearer too.
As one of those health care workers who wear a mask all day and do manual work, carrying people downstairs and doing cpr I still feel sorry for removal men having to wear masks and I certainly do not think they are feeble for struggling with it. Also if they are not provided with enough masks to change them as soon as they get damp then they are worse than useless.
I do hope they are provided with enough drinks and decent lavatory facilities, mask wearing is very dehydrating even in cooler weather.