Dunno what you're trying to prove here, apart from "removing an outlier from the data makes the data closer to the average", which is pretty obvious.

But you can clearly see that the graph shows Europe, not EU, so using your same calculation with the population of Europe, which is 745 million and excluding France, the result is 1.13.

Also I don't see any indication that OurWorldInData is using an average of countries (which would be stupid). Considering their jobs are statistics, they probably know how to aggregate per population, aka a weighted average.