you're right.
Examples of Non-Safety:
(a) Player intercepts a pass with both feet inbounds in the field of play and his momentum carries him into his own end zone. Ball is put in play at spot of interception.
(b) Player intercepts a pass in his own end zone and is downed in the end zone, even after recovering in the end zone. Impetus came from passing team, not from defense. (Touchback)
(c) Player passes from behind his own goal line. Opponent bats down ball in end zone. (Incomplete pass)
