When you play professional to read sheet music is a requirement.
I don't agree with this.
There are many professional settings and gigs that don't require the ability to read sheet music.
Sheet music is only required, if well, the gig/job requires the person to be able to read sheet music.
I also disagree with the idea of sheet music becoming obsolete. Songbooks in standard notation are still being released to this day.
Whether chord charts or sheet music is preferred depends entirely on the requirements of the gig.