A Nobel Prize would not exempt me from the rule that scientific claims have to be backed up by evidence. However, if a famous scientist says something, outsiders will usually assume that he is a spokesman. That is what makes quotations important. Y. Or, you may have a book that says so. No, not always.
Some authorities are more authoritative than others.
Some have wandered outside their area of expertise. Some were speaking about a specific topic, not in general, and perhaps the context has been garbled. Some authorities have retracted or repudiated statements - that has happened. In short, a quote may be worth looking into. It may not be what you think.