This branch of Buddhism appeals to a group of people. It's not for everyone. Just like any other branch of Buddhism.
I'm happy that it's changed those individuals' lives. Awakening comes in many colors and forms, and so long as people become kinder, deeper, and more patient, it does not much matter how they get to the top of the mountain, the view is the same for everyone at the top.
Some people reason in ways that resonate with Ikeda's teachings. He also seems to be regarded by his followers as a living Buddha. I do personally find Nichiren these days a bit much about Ikeda and less about the dharma, but that's just me. I'm not the fondest person of personality-centric traditions.
I recently made a juzu on request for a man who found me online (and then we discovered we're related by marriage... so weird). He's my dad's wife's brother, and neither of us knew of our relation by marriage when he asked me to make him a juzu set, not till much much later after they were nearly complete. He had simply seen some of my work and said, "You! You must be the one to make me these beads." LOL
In the last year, I had to research a great deal about the tradition so I could make the prayer beads correctly (they have to be the most complicated prayer beads I've ever made) and traditionally every part of the juzu has meaning, the beads, shapes, placements, it's a lot more complex than a traditional Tibetan mala. I had to learn the meanings of each component to make them correctly traditional for my patron and get it right.
Now I know a bit more about the tradition than I used to, interesting as it is it's still not my cup of tea, but I at least appreciate it now more than I used to.
The important thing if it resonates, is that you pursue your own realization with the zeal of a scent hound.