UBI will give you a basic introduction to tools, techniques, and current technology but nothing replaces practice... being able to think on your feet and problem solve are important skills as is the habit of being a constant student to stay on top of what's new and old.

Working on your own bike is a lot different than working on everyone else's bikes... there is always something new to deal with.

Knowing where to look for answers when you are baffled is also very helpful.