This is not so much a myth as an over-looked fact. YES we know garry sobers was not a great bowler, or even in league with good ones of his era, some where between average and good, maybe an ashley giles. We know that makes the all-rounder debate vaguely interesting in some ways but here's the thing he was the best batsman the west indies produced. yes, better than headley, viv richards and lara, and if we're placing him on bat skill you're probably looking at a more realistic contender to the #2 behind bradman than tendulkar.
AND he bowled pretty damn well. which is why people rate him so highly, would have been quite handy if england could have picked Giles for the ashes and played him at 3 or 4 and seen him hit triple centuries yeah? yeah.