We don’t know for sure that anyone is cured by it! They’ll have to follow up the participants for a much longer period, before that becomes clear - and also whether there are any long-term adverse effects.
I think it’s generally accepted that MS IS an immune system disease, so I don’t question that part. But as we don’t really know what makes the immune system start acting strangely, will a complete wipe of it permanently solve the problem, or will the same processes start to act on the “new” immune system, and in a few years, MS will re-emerge?
Of course, buying “a few years” of low to no progression wouldn’t be trivial, but not exactly a “get out of jail free” card, if it needed repeating every five to ten years. And every time, you’d be accepting the same risks. How many times would you stay lucky?
Tina