"Why Didn't They Use The Time Turner In Harry Potter To Just Kill Young Voldemort?"
"In Harry Potter and the prisoner of Azkaban, everyone loves to point out that if you can time travel, you can just go back to the past and fix every problem, like by killing voldemort when he was a baby for example.
If you'd just pay attention, you'd see that you can't actually change the past, you travel to the past and effectively live the same exact situation from another perspective. Future Harry saved past Harry, and future Harry was always there to save past Harry, nothing was changed by going back in time.
There will always be paradoxes when time travel is involved, but the remark of 'fixing' the past is just not valid. However, I do have to admit, when they created 'the cursed child' it all went to [email protected]#t. That play makes no sense whatsoever and I therefore wish to not count that in as canon"