It is really not impossible for Brazil to be out of top 10 in the FIFA rankings. The current rankings for top 10 is like below:
Source: https://en.wikipedia.org/wiki/FIFA_Men%27s_World_Ranking
Brazil have had a really bad form so far and they will hope for some recovery with their new coach Dorival Júnior. But there is really no guarantee for Brazil at the moment. After failing about Ancelotti we will see how much this new coach can contribute to the team. Brazil have amazing players that they can really do much more than now. Like Argentina have achieved it new, I hope Brazil can win the World Cup in the near future too (the last one was in 2002).
I agree with you. In fact, Brazil should try very hard to be out of the top ten in the world because currently they still have a good amount of points even if they are on the bad days and they could get good results yet. I don't really have any hope in Dorival Júnior and I'm sure this unknown coach won't give anything specially for Brazil but I know Brazil needs a bigger chance because, unlike the old days when they had many superstars in the team, they are not in the good form and Brazil is getting far from the good days they had before. Dorival Júnior is an experienced coach but if you check the teams he coached you can understand he does not have any non-Brazilan experience and worked just in Brazil.
Dorival is an excellent coach, he was coach of the team I follow (Flamengo) and revolutionized the issue of athletes' interpersonal relationships, they all liked him a lot... Flamengo had some players with relationship problems, with the arrival of Dorival this problem has definitely been resolved... He has a way of dealing with athletes that is very important in competitive teams.
Even though Brazil has a shortage of good athletes, I think Dorival will do better than Tite and Dunga, who were the last coaches.
I don't really know what to think coach and all I know about Dorival is what I saw on the news or some articles about this Brazilian coach but I know Dorival didn't work in any team outside of his own country and This means Dorival is not even familiar with the foreign teams from other country and what strategy they use in Europe which is not good. Also as I can see from his past experience he never worked as a national coach which is another negative point.
However, you are right Dorival is a good coach and he has lots of experience but I think Brazil could have a much better coach than him if they open doors to the coaches from other countries.