Piaffe, you are absolutely right. Anyone can write anything on the internet. Just as anyone can write anything on a "wound" product that they manufacture. So you're right to be skeptical. However if you had called a veterinarian (calls are free!) they'd likely have told you the same things. We euthanized a racehorse insured for over a million because she had a small puncture wound that her trainers decided to treat. It went to the joint, became septic and that was the end of her story.
Again, I agree that you should listen to those you know and trust in the real world and always remember that a phone call to your trusted vet costs you nothing and may save everything.
I have also seen some sad outcomes at the hands of some vets. Seen a leg wound that if treated properly and with the right recourse would have healed without issue. But due to lack of as you referred to as aggressive treatment turn into a complete disaster.
IMO it is wise to use common sense, and a vet who has a good reputation. Also just beacuse a vet or vet tech says so...doesn't always make it so. If something doesn't feel right for you, get a second opinion. We do it with our doctors, so it shouldn't be any different for vets....
Listen to those you know and trust.....don't just listen because they have a few letters behind thier name.
This is by no means a bash towards any vets or vet techs on this forum. I have just had some personal experiences with my many years of working with and around horses, and in the medical field, that not all vets are created equal...some definitely slept through class. :?