You are exaggerating here. Roobet is a popular and reliable crypto gambling site for sure, but that doesn't automatically imply that they will sweep all the awards since they aren't perfect or anything and have their fair share of issues.
There is no perfect casino because every casino has its own plus and minus points depending on player's preferences so all the other nominees are also not perfect because of some reasons.
I would agree and say that its all a subjective perspective of relativity. In other words, it means to each his own. And with all the different casinos, different games, different rules and so on, people can pick and choose their version of a perfect casino, or at least the closest thing to perfect. I also do not expect Roobet to sweep ALL the awards but I am sure that they will be somewhere on the top. A lot of people seem to really like Roobet because they listen to their community and implements changes based on the flow of all those various desires that the community wants to see in a casino.