The rocket can still explode while in space and parts of the rocket can reach the ground without burning up.
Thats not a big risk with rockets built mainly out of aluminium etc, but Starship with its stainless steel that can handle higher temperatures and its heat shield is more likely to reach the ground.
The 11 Starships that have gone through re-entry have so far had no issues with reaching their designated landing zone/spot in one piece (except from some minor parts melting off in their earlier V1/V2 flights).
So far SpaceX has shown that they are willing to play it very safe, but there is always a risk and their future re-entries will also do go over land like Flight 15 did.
https://en.wikipedia.org/wiki/Spacecraft_cemetery
were these other craft not headed for Point Nemo? if not then wtf
https://www.elpasotimes.com/story/news/2019/10/31/ooops-whit...
The 11 Starships that have gone through re-entry have so far had no issues with reaching their designated landing zone/spot in one piece (except from some minor parts melting off in their earlier V1/V2 flights). So far SpaceX has shown that they are willing to play it very safe, but there is always a risk and their future re-entries will also do go over land like Flight 15 did.