Remember when Voldemort had the brilliant idea of using Harry’s blood for his resurrection? Well, your boy gambled away pretty much everything there for no reason.
After existing for many years in the form of a lonely atom, Lord Voldemort understandably wanted to try to return to the living world as something more meaningful than the forced exhale when seeing a funny meme. Of course, for that he needed a real physical body, and to get one he needed a ritual.
As a master of the dark arts, Tom Riddle Jr. opted for the good old ritual involving blood, bones, and grave desecration. The sole purpose of the ritual was to create a new creepy looking soul vessel for someone who actually exists with a body count of zero, but Voldemort as the mastermind had an ingenious master plan.
The ritual itself implied that an enemy’s blood was to be used, and there were no particular requirements as to the race, age, or sex of the enemy in question. But Riddle Jr., in his brilliance, chose to use a 14-year-old British boy with a wicked scar, thinking it would make him immune to the boy’s touch.
Not only does it sound wrong, it was a huge gamble on the part of Voldemort – a gamble that could have cost him everything he had achieved at that point.
The resurrection ritual was a well-documented magical practice for every loser who managed to lose their first body. It contained clear specifications, incantations and an inventory list. When it comes to Riddle’s improvisation with Harry’s blood, things got a lot trickier since it was a one-of-a-kind experiment that wasn’t based on any research whatsoever.
Voldemort knew that Lily Potter’s blood in her son’s veins made it extremely painful and dangerous for him to even touch the boy: the magical protection was far too strong even for the Dark Lord.
His two (!) previous bodies disintegrated when he tried to interact with this blood ward, and what did he decide the third time?
Pump the veins of his new body with this blood!
You don’t have to be a Flamel apprentice to see what could go wrong here. The very obvious result was that Voldemort’s new body was born in excruciating agony and lived on for a few brief seconds before finally disintegrating, just like the previous two.
Even if this were not the case, he would not have been able to work efficiently while being constantly tormented by his own blood. It was a gamble, and Riddle Jr. had no reason to believe his plan would succeed: it could have backfired so badly!
Wouldn’t it have been a little easier and safer to use another British wizard’s blood? Nearly 90% of magical Britain considered Voldemort an enemy, and their blood presumably didn’t have the magical properties of a particularly sharp KFC basket with the specific intent of assassinating the glorified psycho-terrorist.