Excellent observation, FRen.
I know (through mutual friends) two people who have disabled children, and one old personal friend with a very disabled child. My close friend’s child has Rett’s syndrom (sp?), she cannot take of herself at all, and has many cognitive impairments, although she does understand most of what’s said to her. She watches on a tablet, praise music and singing all day long. If it goes off, she screams. She does not want any other music.
Another girl in her teens is very autistic, cannot communicate, will always need care. The one thing she loves most is worship events with singing, she will usually get up and dance as well. Another young man, now a teenager, with pretty severe Downs, is the same way. Even the mentally challenged or disabled can experience the love of God in their hearts. I have no doubt about it.
There is no physical mechanism that makes people believe in God, such love lives in the eternal soul. Sadly, some people try to smother it so they don’t experience it, by many means.