Well, these are signals. Our minds are programmed to send signals and expect others to do the same. These signals helps us understand where we stand with people and where people stand in relation to us and each other.

You might think we don't need these signals anymore, but I think you would be gravely mistaken to assume that. Instead, it's better to (re-)learn these things and adopt them. Think of it as a form of power. By understanding the instincts that drive human behaviour, you can hack it, by controlling how you present yourself in different situations.

I don't think it's something to complain about.