I work at a school and I teach "autistic" kids. Yogani talks about it in secrets of wilder and other places as well and other spiritual gurus talk about how happiness and enlightenment are our birthright. it is interesting because my kids seem to be protected in that they can smile and laugh pretty easily, and are pretty easy to please. but is enlightenment everyones birthright? if the central nerve channel needs to be purified what about people with bad back problems, my sister has a steel rood in her back and my uncle has a big hump in his back? I ask this out of sincerity, I do wish the best for myself and humanity but this question is one that has been on my mind since I work so closely to these kids. Who knows maybe if I become enlightened I might realize some of them are already there.
A good point i must say, but there's a lot of sages who speak that there are no necessary requirements for enlightenment and so on like Ramakrishna and ramana maharshi, papaji etc.
but here in the AYP things are done in another way where it seems that working on the central nerve channel is a must, then i guess the only answer to this problematic here is reincarnation.
so the best thing i suggest here is the suffi way, cz it has similarities between all the ways and it's mainly based on the repetition of al ward which is usually a prayer or a divine name and they work like mantras and they add a lot in the purification process.
but again what if som1 doesn't hear nor sees nor talk etc what about these people?!!!
Again the best fair answer i've found for this problematic is reincarnation.
these are my own views on this subject, so let's see what yogani has to say on this issue.
Kind regards and my best wished to ur sister and all humankind maybe we could be of help for them in our prayers.