I got fed up years ago! Trying to be the perfect dog owner is exhausting for both owner and dog. Perfect diet, perfect training method, perfect amount of exercise and mental stimulation. Both me and my cocker have had better lives since I stopped listening to fanatics on the internet and started using common sense
If I am worried about health issues (including vaccinations) or nutrition I ask a professional, meaning a veterinarian or a veterinary nurse. If I was worried about serious behaviour problems I would ask a behaviour expert. Other than that I just try to make sure that my dog and I are both happy in our day to day lives.
I'm not saying everyone on the internet are fanatics, I still find useful advice on sites like this one. But self proclaimed experts without any formal educations scare me. Too many seek information without applying critical thinking and they present theories as indisputable facts. I'm sure it is with the best intentions, but there is a reason why vets and doctors go to school for a million years. The internet does not replace properly educated and experienced professionals in any field.
Nah, enjoy life with your dog, use common sense and call a vets office if you are worried about something

The internet will scare the life out of you if you give it half a chance.