I would say cooking them in their own (hot dog) juices beats leeching the flavor out by boiling them, beats heating them up quickly in the microwave, and is comparable to cooking the whole way on a grill. Mainly it is just convenience and the end result will be as good or better than cooking them another way.
Now if I happened to be grilling something that’s another time I might throw a pack of hot dogs on (but that’s a story for another day/forum). Lol.
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