I haven't played RDR2 or RDR Online, but I doubt it's in the same league as, say, something like Candy Crush. In my opinion it's probably better for you than binge watching a Netflix show because it's less passive.
Nobody is prescribing this lifestyle for you, so feel free to return the favor and let them live theirs.
It's one thing to talk like this to somebody you know, but randomly speculating about how somebody you'll never meet might be living a lifestyle that you don't approve of is without question a less worthwhile activity than playing video games.