If we check deep facts about all teams and their possible players then surely I am feeling France is moth lethal team in this world cup with have full ability to defend their title because they have too many quality players for all departments and these players are already doing good job in their clubs, and we can call them cream of Europe because of their strong play and quality.
With this comparison there is no competition with Argentina which is mostly depending on Messi and others are also good but have no enough quality like France and this is going to be the biggest difference between these teams here Brazil is also having few good players but comparison they are also not good enough like European teams which are currently good and having better quality for winning.
I agree that France is very strong, but this does not guarantee anything especially at the playoff stage. If you recall the last European Championship, then France was just as strong there as it is now, but in the end they were eliminated at the 1/8 final stage, and it was knocked out by not the strongest Swiss team.
In fact, I would be happy to see in the champions some team that has not yet won this title, but the pool of "traditional" contenders is too strong.
France also played very poorly in the last competition before the World Cup, the League of Nations.
However, it really doesn't mean anything because France has enough time to prepare well for the World Cup and show its quality.
Speaking of the European Championship, it is interesting that the European champion from the last European Championship, Italy, will not participate in the World Championship again.
As for a new national team that could become the world champion for the first time, my Croatia was very close to that at the last world championship in 2018 in Russia. Maybe this world championship will bring us a similar surprise.