One thing many folks don't do when towing is to add extra straps for added security. I've seen videos where someone had to brake suddenly and the boat just climbs the bow roller (after breaking the strap and safety chain) and end up on top of the rear of the tow vehicle. I didn't do it in this picture because it was my first attempt at towing the boat and I hadn't yet seen those videos.
Ever since I saw those, I never rely just on the strap and safety chain! Now I slip a 3,000lb ratchet strap through the bow eye (after the the main strap and safety chain are in place) and hook it to the trailer eye loops. I also thread one of those straps through the rear cleats and secure them to the eye loops at the rear of the trailer for added security. I can tell you that it makes towing the boat feel much more secure. No wobbling on the trailer when you hit a bridge expansion joint or a bump in the road!
Remember, you might be able to stop the tow vehicle safely but if something fails, you're not stopping 9,000 pounds of inertia behind you once it gets moving!! The laws of physics will ensure that!!
Between the truck and the boat, there's just way too much money invested for me to risk a "holy f@#ck" when it could easily (and for about $30.00), be avoided.