> >seems to taint young people into thinking that their employer is their enemy
> Is this not true to a first approximation though?
No, not at all. The company wants the employee to do well so that the team does well and the company overall does well. If the company was "the enemy", they company would be wishing for the employee to fail, which is not why they spent a lot of time and money to hire you in the first place.
Now, of course the company isn't your friend (or family) either. The employer doesn't exist in the friend-enemy axis, they're just an employer which is a different type of relationship.
Also, who is "the company"? People in upper management and HR, i.e. those who see you as a number on a spreadsheet but don't ever interact with you personally.
But most of your interaction is with your first and second level managers who are specific people. One would certainly be well advised to cultivate a professional friendship with them. Not only will you do better, but work will be a lot more pleasant.