Yes, you will need to use Disk Utility occasionally:
Format external drives that you might use.
Erase or partition drives that you need to re-purpose.
Using the First Aid function -- simple tests of directory structure on the drives that you already have. That gives you a first-line check to let you know that a drive might be damaged, or maybe just needs a quick run-through.
You can also use Disk Utility to encrypt drives.