Because races are more than just the strategy or technical skill of racing. Half the entertainment in most sports are the storylines and this race was full of stories. When Max got a 5 second penalty it opened up the storyline of Leclerc possibly ending his unfortunate streak of starting on pole and not winning. Then there was Perez having a really unlucky turn 1 that he turned around and was even P1 for a stint, only to be robbed of P2 by Leclerc on the last lap. Then there was Sainz first being screwed over by the FIA but then also having a poor turn 1 only to turn it all around and finish in points. Oh and of course Max actually having to race for the win. And those are just some stories off the top of my head. So much more happened in the race that was beyond just strategy or skill.

If you watch F1 just for the actual racing then I agree it wasn't all that great, but I think if you're watching it just for that reason then you're missing a lot of what makes F1 entertaining.