I suspect it depends upon how you learn. I had a look at Yousician and it seemed infantile to me. Kinda' like guitar kindergarten as best analogy.

GT is definitely worth paying for.

Affordable quality tuition by outstanding enthusiastic instructors.

I suspect many who join feel the same about it gauging by the noticeable ratio of adults of a certain age here who have garnered sufficient discernment in their life experiences to avoid wasting their money, effort or time on junk.

Evaluate them all and discover which is for you. One way or the other, a paid subscription to one structured online course or the other is definitely worth it in my view.