The label of that QBrec column reads as "Team record in games started by this QB (regular season)" Team is the operative word here.
To show how flawed your argument is, what happens if say Josh Allen started a game and threw 3 passes that were all incomplete before he got benched for Matt Barkley to rest for the playoffs? Barkley proceeds to handoff the ball say 40 times and the Bills manage to win. Josh Allen would get credit for the win under that QBrec column even though he had zero contribution to the win.