That's a great point, and this is a documented effect in education:

https://en.wikipedia.org/wiki/Pygmalion_effect https://en.wikipedia.org/wiki/Golem_effect

Generally, people treat us differently when they expect more or less from us (based on what they've seen from us or facts they know about us). People also experience a tendency to rise to high expectations or fall to low ones. See also:

https://marginalrevolution.com/marginalrevolution/2018/10/hi...