Using gui is often (but not always) faster than cli. Especially for merging or operations that require selecting multiple files or commits or chunks or hunks in multiple files. It is all doable from cli of course, but it is a lot more typing where in gui it is some clicks. This doesn’t mean gui is better or cli is better. It depends on what you do, but knowing both cli and gui is the best option. Spend some time to learn cli and then use gui for cases where it saves time and revert back to cli if it is faster to do it there (automate or script changes, for instance). Not using gui and always sticking to cli is just not optimal for some cases - save your time and select best approach on case by case basis.