Whatever we are talking about, depending on where we are looking, who we are asking, we can find polar opposite views, opinions, experiences about it.

Simple example is a restaurant review.
There is a nasty, negative rating and on the very same day another happy, positive one.
How will you know which one is to believe to?
How will you decide whether to go or not to that restaurant?

It will entirely depend on you.
On your mood in that moment, on your general attitude, on your previous experiences, on your wants and needs.
How?
Like that if you are in the blues, not even sure if you want to go out to eat at all, if you had at some other time at some other restaurant some bad experience already, if you are not that hungry and anyways you have other options like ordering food or finding something in your kitchen, you very likely will believe the negative view and will not go.
On the other hand when you are happy, willing to go out, had no particularly bad restaurant experience before, hungry, having no other options to choose from, you will trust the positive rating and will go.

Relying on the ratings from complete strangers, without any knowledge of their possible agendas, of what was the reality of their ratings, of what might had influenced them to write whatever they did, you made your mind up, believed one of them, made your decision.

Whatever you decided, whatever happens next, you have no right to blame the reviewer, you can’t make them responsible.

The fact though is, when you never go to that restaurant ever, you will not have a personal experience and so neither the right to claim a well-established opinion really.
Contrary to that, when you go, you will gain experience first-hand, and so you can form your own, grounded views.

… and this shit applies to anything and everything in life!

When you have an opinion about anything that you had no personal experience with and you are stating whatever you believe for God only knows why to be the truth and are eagerly spreading that out and wide, you are losing your credibility.
And so does everyone else doing that towards you!

Having an opinion is a human right. Believing whatever, to whomever is a personal choice.

To be authentic and stay trustworthy I find it a good idea that when stating something without personal experience, without thorough knowledge, is best to start by saying something like ‘although I have no personal experience, my opinion based on … is … ‘

When someone is not into an open discussion with you by talking, asking, listening, showing curiosity towards your views but throws ‘facts’, views, opinions at you about anything in life, especially concerning your looks, relationships, sex life, likes and dislikes, preferences (particularly when you didn’t even ask for it), you have all the right to not listen to that person.
Use your legitimate self-defence and ignore, use the ‘Ctrl+Alt+Del’ combo on them.

You are the only one with a full knowledge on your whys and why nots, you have to be the title character of your own life, you are no less (not more either) then anyone else, regardless of your life choices.

Therefore, whenever you decide, choose, do or don’t anything, make sure it is your decision, your wholehearted yes or no!
And thus you can take full responsibility for it too.