For society to function a certain degree of public trust is required and you need to be reasonably sure of what is going on in somebody else's mind, what they are capable of and what you'd expect them to do for a random stranger. In smaller communities (mostly in non-western cultures) there's a high degree of interdependence and community. In large cities this is eroded and you have to watch your a$$ because you realize pretty quickly it is everybody for himself.
I don't think it is wrong for you to have high expectations from certain people. You should expect more from your spouse than a random woman you just met or a friend you recently made. Your parents should look out more for you than the average individual. Of course it's not mandatory that these ppl meet your expectattions and if you recognize they don't you should bush them with the quickness but a standard has to be established and met. So, no there's nothing wrong in having expectations what is wrong is expecting everyone you meet to meet or even exceed them. I generally respect my friend's time but I have found not everybody reciprocates. I've learned to expect most ppl not to reciprocate but it doesn't bother me any less when ppl don't because i've shown by my actions that it is totally possible for another human being to respect an associate's time.