Regularly is an exaggeration.
And they will also have just as frequently seen burns and scalds from hot drinks, food preparation, baths/showers etc.
Anyone working in A&E will have seen many, many cases of horrific injuries resulting from getting in a car, riding a bike, gardening, using stairs (and in fact steps outside), camping, caring for or walking pets etc etc.
Some of the people I know who have worked in A&E are the most dare devil types. Once you've seen people die from only venturing into their loft or trimming their hedge, I guess you think "why not bungee jump and go dramatically".....