Is it bad that I only take marriage advice from people married for a lifetime?

I just don't want bad advice. I only seek out marriage advice from happily married couples of 20+ years. I mean people get married and divorce 5 to 10 years later. I'd rather have advice from people who have made it. If they have been married literally a lifetime that's even better. I just don't want advice from people who obviously couldn't stay in a marriage or who just don't have enough experience. Opinions?