There are precious few universal truths about trading: 95%+ of what's written about it is just someone's opinion - an opinion which may not be helpful to you at all.
Unless what you read, watch or listen to is a cast iron, water tight verifiable fact - then it's just another opinion for you to question and scrutinize. Don't embrace it unless and until you're completely satisfied that it complements your views and beliefs about the markets and how to trade them. This principle applies to everyone without exception, including trading pontiffs, gurus or other 'experts'. Novice traders routinely lap up their pronouncements on the grounds that they must know what they're talking about because they're rich, famous - or both. Remember, this is just their reality - your reality may be very different!
Understanding this and having the confidence to act on it at the start of one's trading journey is tough for obvious reasons. Nonetheless, had I had an awareness of it early on, it may have saved me countless months (years?) spent going on wild goose chases, red herrings and meandering down endless cul-de-sacs etc.
Tim.