I disagree. I use it daily as my tool to manage data in MySQL, Postgress, Sql server and Db2 databases, and it's probably one of my favorite JetBrains tools. As a Linux user there aren't that many good options available, and I am very grateful that they added this product to their line.
The Database plugin from IntelliJ and Datagrip is essentially the same. My guess is people like to have separate tools based on their purpose and Datagrip serves that need.