Very similar story to the Scholes revisionism.
They both won everything in amazing teams in their prime, and were un-droppable, but were not the "glamour" players for their respective teams so weren't spoke about as greats at the time.
Then once all the Beckhams had moved on, they were a throwback to those classic teams and importantly still performing in elite teams, and could play breathtaking long passes that the fans and pundits loved. The pundits were also important, because by the time the pair of them were 35, most new pundits had played with or against them, or knew someone that had, so each game you would have a familiar player in the studio going "playing with Scholes is the easiest job" etc.
Both players are absolute legends and deserve their spot in footballing history, but do get a small amount of inflation due to the timing and longevity of their careers.