Why doubtful? Bill Gates is incredibly talented, and being in the right place at the right time is more or less the definition of opportunity.
He still would have been successful without all of those things together, but not at the same level.
You can't do much about your inherited or birth situation, but the extremely successful people I know usually have a very fortunate background and also worked hard to expand their future luck surface so that when outrageous opportunity lightning was looking to strike somewhere, they had an outsized chance to be the spot.
Listening lately news about Bill and he's circles of friends.. I can honestly say I am not surprised why these certain billionaires are never prosecuted of anything..
Microsoft paid hefty fines for its monopolistic behavior...
GP shouldn't insinuate vaguely, IMO.