Of course, different belief makes different perception. For example, a devout Catholic will have a different perception than an Atheist. And a Democrat usually doesn’t view issues the same way as a Republican. They do not have the same belief. That is the main reason.
Take the shoes for example. It has the same principle. Some one likes custom shoes for personalization. But someone don’t. Someone will purchase a shoes printer only for one desired image. That all depends on different conceptions. These are hotly debated topics because each participant believes their view is based on fact.  But can they both be factual?  Yes, but skewed by personal perceptions.  So when you have a negative thought about yourself, don’t consider it a fact until you also reflect on the opposite view.  And if the alternative is more positive, accept that to be your truth.
An anorexic looks in the mirror and thinks she’s fat.  As a result she starves herself and deprives her body of vital nutrition.  But society thinks she’s too skinny.  Unless she can change her perception, she’ll never agree with society.  And she’ll never get better.  What are you seeing in you that is preventing you from realizing how beautiful you are?  Or how smart you are?  Or how lovable?  If you take the positive view that is how other people will see you too.
More often than not the critical statements that damage your self-esteem are originated in your own mind.  Now you know how you can silence them.  But if a negative observation does come from someone you love, know that honesty without compassion is brutality.  A judgmental or derogatory comment is usually not about the recipient, it’s about something that is going on with the accuser.  Don’t believe anything that is said to you that isn’t in your best interest.  And don’t waste any time or brainpower on anyone who doesn’t perceive you as amazing.
It’s what you think that creates how you feel. Design your own custom shoes, despite other one’s critical eyes. If you like it, it will be the top one. If someone tells you you’re fat, or stupid or otherwise unappealing, the only person you should think badly about is them!