No .The fact that there are some players with bad technique that play well does not validate your bad technique. If you decide you should walk on your hands and sit on your face, that's your business and if you can do it with style and grace, more power to you. Unfortunately, that might lead others to walk on their hands and sit on their faces and it's likely they won't be graceful.
This is a reasonable approach. I took some classical classes in college and I worked with a couple of guys that went on to get doctorates in guitar. Watching them practice was really kind of inspiring to me. I never got as good as they were, but I was better for what rubbed off.I did nothing but classical for 5 years. I learned a lot and some guitars are more suited to classical technique, like flat, thin necks. But, my electrics fit in my hand differently, and certain things like bending require a different approach.
Some stuff requires thumb over to get the desired results. It’s good to start out properly, but once you reach a certain level of proficiency, you can do what works best for you, and view the rules more as suggestions.