When you rent housing, your landlord is likely to require some identification for a credit check. Your face isn't going to make a difference here, because you already handed him your ID. Where it might make a difference is internal security camera footage: if you let your significant other live with you without paying rent, the landlord will know because her face will be recognized. If you sublet without notifying the landlord, he'll know. If you're running a flophouse or drug den, he'll know. But he already knew who you were before you signed a lease, because ID is more than a face.
You're young then. Flying anonymously was the norm. You could go to any travel agency and buy tickets cash. They had a name on it but it didn't matter, put any random name. Or have someone else buy it and give you the ticket, that was fine too.
Getting past security was back then only about actual security (screening for weapons). You did not need a ticket nor an ID of any kind. Then board the flight with that ticket you had from wherever.
That technically didn't prevent someone from giving away their boarding pass once they had it, of course.