I'm definitely one of those "into boardgames" people so take this all with a grain of salt :p -
Risk is definitely a great game and imo people who are into games and don't want to play are saying that because it's
1. long &
2. they've already played it enough to have mostly figured out the strategy
Diplomacy is very good and like risk it has very simple rules, grand stakes of world domination, and actual direct conflict.
Unlike risk, there's small numbers of units, no luck, and you need an ally, ideally multiple allies, to accomplish anything.
If you're looking to get into it I can reccomend text-based turn-a-day style play with strangers on webdiplomacy.com
I can only stomach a game of it every year or two because it's legitimately heartbreaking when someone you've spent two months working with every single day stabs you in the back causing you to not lose the game outright but be a crippled angry husk for the next month, and then lose. Tried it with friends once and it was just too much, even with anonymous strangers it hurts.
Anyways sorry for the ramble :) go risk, and go diplomacy <3