This "never lose your starting job due to injury" obsession is stupid IMO.
If a player improves to the point that they should be starting, then they should start.
What about if, say the Lakers had Eddie Jones starting at SG when Kobe was a rook, then Jones goes down with an injury and Kobe starts averaging 20ppg. Should Jones get his job back?
It's one thing if Joey Graham takes your starting job, but come on! If your replacement merits all-star consideration, then it should be a long, hard debate whether you should get your starting job back.