I used to teach first aid at work and basic first responder courses about 25 years ago and it was a consideration then, so I don’t think it’s a new, or growing concern. I never paid it much mind, mind you I have professional indemnity and liability insurance, but then I also have the concept of the ‘Good Samaritan (SARAH act?)’ to fall back on which covers HCPS and doctors for off-duty aid rendered? And other professionals I think, but I can’t remember
I believe the Good Samaritan act covers any trained medical professional which includes first aiders. Maybe just the providers I have gone to recently, they seem to be making more of a point of it now than I can remember.