Answer:
This question requires a personal answer. I will give you one as an example.
Step-by-step explanation:
One of the most repeated expressions by everyone is: we do not care what others say about us. That the important thing is to be yourself regardless of the opinions of others. Which is an example of a lack of personality to change due to peer pressure. If they tell you to jump out the window, do you jump?
However, perhaps we are so strict repeating this series of ideas because, deep down, nobody is like that, not even us. What's more, living refractory to the opinions of others is not a sign of personality, but rather a poor functioning of the healthy brain.
All, except pathological cases have evolved to thrive in social groups. Loneliness and individuality are synonymous with death in the evolutionary context. Thus, the brain has been wired to be extremely permeable to the social breeze, turning one way or another depending on how it blows, which weather vane.
It sounds a bit contradictory, but it makes sense: people need to belong to groups, but these groups must be beneficial to us. Given that there are different groups in the world, we will choose the one we consider the best (or the one that accepts us more easily), and we will disdain the rest, considering them inferior, strange, counterproductive or any other epithet associated with rejection.
Most people say out loud that they do not care what they think of them, paradoxically so that others think precisely that and nothing else.