Okay first — my first job paid $40K and I took it without negotiating. Left $15K on the table because nobody told me I could ask. So I have feelings about this.
Two questions before I answer yours.
One: is your friend's role actually the same, or just similarly titled? A software engineer at a Series B startup and one at a FAANG are different jobs with different comp ceilings. Not comparable just because the title matches.
Two: have you signed yet? Because here's the thing — you haven't signed. Which means you have the single best negotiating window you'll ever have with this employer.
Tell me more about the role, the process, and how you got to the offer. I'll tell you whether $72K is fair and what to say to get more.