Purely out of interest I looked up some 'famous' modern muscians/vocalists with dyslexia

Cher .
Brad Little .
John Lennon.
Nigel Kennedy, Violinist.
Bob Weir, Grateful Dead Guitarist.

A brief look at biographies yielded the information that
Cher and her sister lived in dismal poverty with their divorced mother until 1961.
Although their financial condition improved when their mother remarried Cher already was a 'rebel' at school and left when, at 16, she met 28 year old met songwriter and producer Sonny Bono.

Brad Little was educated in the American public system although his father, an academic, said that he sometimes ached for his struggle but felt it had "become a symbol for his confidence in his ability to achieve in the area of his considerable talent and expertise."
When his father was conducting a university study abroad program for college students and lived in Salzburg, Austria brad had a year of home tutoring

When he was four years old, John Lennon's parents separated and he ended up living with his Aunt Mimi. His father was a merchant seaman and John did not see a lot of his father when he was small; his mother, Julia Stanley Lennon Dykins, was struck and killed by a drunk driver in 1958.
John Lennon was educated at Dovedale County Primary School, followed by Quarry Bank Grammar School (from 1952 until 1957) and the Liverpool College of Art.

Nigel Kennedy was born into a musical family
His grandfather, Lauri Kennedy, was principal cello in the BBC Symphony Orchestra.
Nigel's father, John Kennedy, became principal cello in the Royal Philharmonic Orchestra under Sir Thomas Beecham, but then moved to Australia, possibly not knowing that Nigel had been conceived.
His mother, Scylla Stoner, was a piano teacher.
Aged seven he won a place at the Yehudi Menuhin School, the UK's most elite training institution for gifted young musicians; Menuhin's family sponsored his education.
He has been known to clam up about this private intensive teaching environment once commenting
"Well, like, the only sport we were allowed to play against other schools was table tennis, because otherwise we might damage our hands. And there was this guru who taught yoga." Menuhin was passionate about yoga and insisted on its inclusion in the curriculum. "He used our table-tennis table to give demonstrations – maybe he was trying to levitate or something – and he completely wrecked it! I took up running to get away from the yoga."

Bob Weir was raised by his adoptive parents in a suburb of San Francisco
He attended mainly independent schools in the area but had trouble with his dyslexia and was expelled from nearly every school he attended
In 2002, Weir signed on as an official supporter of Little Kids Rock, a non-profit organization that provides free musical instruments and instruction to children in underserved public schools throughout the U.S.A

A mixed bag probably as far across the board of educational experiences it's possible to get!

I apologize it adds nothing to the argument one way or another but...... it is a music site folks :)