Well, third person games with online can be very different. Uncharted feels nothing like Gears of War for instance.

But I disagree that FPS online games fee genetically the same. Try playing CoD and then Red Orchestra. Totally different.

Not really...lets say you have 2 players.

Player 1 has Overwatch
Player 2 has Elder Scrolls Skyrim

They both player their games continuously for 8 hours straight. Maybe they shit themselves...who knows.

Player 1 will have experienced everything Overwatch has to offer, most likely 2-4 hours in. All the modes, got all the Arcade loot boxes for that week, played the training room to test each character, been on all the maps etc. He's played a good handful of matches.

Player 2 will have probably spent the first good hour alone on the character customization. If not he would have gotten out of the cave and wandered around for a few hours to explore the world and most likely either done a side quest or two.

Overwatch in this example looks more repetitive. Now I guess it's about the genre of the game but even if it was something like Uncharted 4 you'd still have the multiplayer and the single player, the latter being something you'll go on again either on a harder mode or to find the collectibles.

We're all soldiers now

True!!! It's just a matter of how much joy we can get out of the repetition that makes a difference in whether we complain about repetition or enjoy the game.