For good reason. Learning fluency reading sheet music is critical. Rocksmith is great, with caveats, but the fact that they, by default, invert the strings compared to tablature conventions on guitar should be proof enough that they are pedagogically terrible without some guidance.
The other problem is that their learning technique, in which you start with fewer notes and add in all the notes over time, is not good at ALL. It masks certain things from you and even makes some things harder at lower difficulties when it's playing some scale and you don't know that so you're just playing random notes in it. Knowing that it was just a pentatonic scale or something would make it much simpler. Instead, you're taught to just play isolated notes instead of learning how to understand what that scale was, how to play it, and how to apply that to other songs. It's almost outright hostile towards a big picture music theory based approach on teaching how to play and instead focuses on memorizing the specific notes for each section of each song.
Anyway, piano scales and chords are not challenging to learn compared to most piano technique. If you don't have a teacher then buy Hanon, get a decent music theory book, and look up Youtube videos. Any of these training wheels based learning approaches seem to just assume that once you do it enough you'll pick up the theory. No. If you can't afford lessons (which I stress are very important) then you should at least make use of simple music theory books and videos on Youtube.
Yes - the usual comment with these things is that you're not learning notes, you're learning movements.
Scales have specific fingerings and hand movements, including thumb over/under movements at specific locations.
They're not optional extras. They're essential for fluid playing.
More subtly there's also basic finger/hand positioning, which has to be a difficult combination of as-relaxed-as-possible but also firm and precise, so you get fine control over dynamics and timing.
If you don't learn the vocabulary of physical movements, you won't have the physical foundation you need to play notated music properly beyond the very basics.
Upvoted. As a beginner guitarist, I find that Rocksmith’s approach doesn’t work well for learning songs. I prefer to turn up the difficulty to 100% and turn the tempo down to something I can play comfortably and then gradually increase the tempo. This has the drawback that the song sounds very different when played at 25%. It’d be nicer if they were more judicious in their choice of notes to play for their lower difficulty levels.
At the moment, I’m focussing on working on my timing by playing rhythm instead of lead guitar.
That's 100% the right way to do it and how traditional learning works (you just use a metronome and slowly work up to full tempo)
If you haven't already, please PLEASE choose the "invert" option for the string order. Your low pitched E string (the red one) should be on the bottom of the strings. It will mean that all your work will transfer immediately to both guitar tabs as well as conventional chord charts. The fact that Rocksmith is teaching people to train their muscle memory on upside down chord charts is so insane to me.