Video games are a new way for people to learn guitar.
What they do well is keep people engage who would otherwise find learning the guitar a bit boring. So they’re definitely great at the whole “fun” aspect.
However it would be hard to put the game down after playing it for a few months, and play the guitar without it. In the end you master a game, not an instrument.
There are much better ways to learn the guitar for real so to speak, and these would be with online lessons. However if you want to have some fun, and still learn about the guitar, then give them a shot.