They’re mostly wrong. I understand you might be wondering why. Let me clarify.
The first time you see something or meet someone, you get an extreme image from that object, experience, or person, so you make up your mind and decide that is it. It’s either very good or very bad. There’s not something in the middle, unless you seriously weren’t paying full attention.
Anyways, you’d rarely give it a second chance to probe yourself wrong.
However, if you reconsider and try again, you might see or experience it with a different perspective. Most of the times, we experience cases that make us not want to do it ever again because they were vey bad experiences. In these cases, you have to try overcoming this fear because second thoughts and opinions are very powerful to determine long-term views, decisions, and actions.