Thats really easy to say in hindsight, in a world where almost all the sources are roman. But imagine you could go back in time, do you think your argument would be very compelling to people being subjected by romans?
Not to mention how doubtful it is that every single tribe and nation conquered by Rome somehow ended up bountiful and happy like some history enthusiasts would have you believe.
Theres also the question of whether these people could have made said advancements on their own, or through peaceful trade and exchange of ideas. Personally, i think they probably could have.
..... Bro where were you yesterday?? Hahaha we've started a whole philosophy debate now uuuuuuughhhhh