There is no such thing as being so powerful that no other nation will dare attack you.
Except for these guys
, of course.
You can't forge a good relationship with someone if you refuse to accept that others are operating in good faith. That kind of attitude towards a foreign society can lead to a great deal of unnecessary conflict -- and can influence an otherwise peaceful society to behave in a hostile manner without real justification.
That does work for both the Federation *and* the Pact, of course.