Yes but you could say the same about every team. How far do the Cavs go without LeBron? Or Houston without Harden? Or even GS without Curry. Injuries are part of the game and are factors that show winning a le requires skills and luck. Spurs have as good a shot as any to win a le.
While we are speculating, would the Spurs have won the le in 2000 if Timmy hadn't injured his leg at the end of the season after landing on Pollard following a massive dunk? Lakers were clearly the best team in 2001 and had aura of invincibility in 2002, but were totally beatable in 2000 and had a few close calls. But alas, Timmy gets injured and Spurs lose in Round 1 to the Suns.