Competition pilots find this kind of adjustability a must. Standard radios sometimes have basic mixing but never advanced mixing. What mixing they do have is not as precise nor as adjustable as a computer radio. Also, the setting cannot be saved for more than one plane. However, these radios are simpler to use.
Many beginners simply find computer radios too complicated.
Many fields have radio control clubs. The club may even have members dedicated to instructing. If so, by all means join the club and take advantage of the training. AMA supplies supplemental insurance coverage that most flying field owners insist upon for field use.