“Indianapolis” is the biggest race in the world? That is an opinion. But I think you mean is the Indianapolis 500 race for “Indy” cars on Memorial Day weekend.
F1 cars and the F1 series has never had anything to do with the Indianapolis 500. Different cars; different series completely.
‘Indy is the best”. Best what? Not track.
It has history - for Indy cars - but that is about it. For Nascar, Rocky is more important historically.
Le Mans is an endurance race. Not a drivers race. It goes for 24 hours and lots of changes of drivers. It is all about engineering.
Yes.
F1 cars and the F1 series has never had anything to do with the Indianapolis 500.
That's not correct. Again, Indianapolis was formerly on F1's schedule. It counted for the points. Even following its removal from the schedule, a lot of F1 drivers continued to race at Indy. Indeed, F1 drivers have a long history at Indianapolis.
‘Indy is the best”. Best what? Not track.
Best everything. Best race, best venue, best month, best trophy, best traditions, best qualifying, best PA announcer, best crowd, and, yes, best track. I don't see anyone else kneeling down to kiss a row of bricks at any other track on Earth.
Le Mans is an endurance race. Not a drivers race. It goes for 24 hours and lots of changes of drivers. It is all about engineering.
Le Mans and Indy make up two of the three legs of the Triple Crown for motorsports. These races are historically important for motorsports. And not a driver's race? Is that why Tom Kristensen wins year after year with umpteen different teams?