[whatever_dude]

To me it falls into that category of things that you don't know what you're missing until you use it.

A visual client just makes much much easier to visualize the state of a repo immediately, the relationship between branches, and individual changes over time. You see a commit from another branch in a list and you click on it; it's instantaneous and the diff is shown in a window. Doing the same on the command line takes a bunch of arcane commands and is extremely longer to execute.

Some things like interactive rebasing are also much easier (you can double check diff as you go, again with a click). Committing just hunks of a file is also much easier.

Some people are comfortable with the command line for everything and that's fine. But the reality is that certain actions are so cumbersome to execute via the command line that some people can never be bothered with them. In that case a GUI helps immensely.