I've never rinsed
you're washing off flavor/juice in my opinion
you're going to cook it anyway so if there's a microscopic worm or two they will be cooked and fall off
if you can actually see worms before cooking then I think you may have gotten some bad meat (maggot?)I would throw it in the trash can and buy some fresh steak
fresh steaks should not have worms
if they are microscopic they will cook off so not to worry
don't rinse off the flavor