You're right most people are wrong but don't know how wrong they are. It took me 30 years to learn how frequently I am wrong. Just do The Four Agreements from the eponymous book (the book's not worth the read IMO)
1. Be Impeccable With Your Word. 2. Don't Take Anything Personally. (Most people are wrong) 3. Don't Make Assumptions. 4. Always Do Your Best.