Apart from the fact that The Mandalorian S2E6 has it all, the episode also gives an explanation as to why Jango Fett wanted an unaltered version of himself for a son.
Boba Fett reappears in The Mandalorian “The Tragedy” episode and retcons much of his father’s past.
The first time Jango Fett was introduced was in George Lucas’ Star Wars: Episode II – Attack of the Clones, which is also the movie in which he was killed by Mace Windu during the Battle of Geonosis. He was the bounty hunter involved in the plot to assassinate Padme Amidala.
But there was more to his story. Hang tight for a trip down memory lane and review what happened… to Star Wars fans, this is such a delight!
In the Star Wars: Episode II – Attack of the Clones, when Obi-Wan Kenobi tracked Jango Fett back to the planet Kamino, he learned that the Kaminoans were building a Grand Army of the Republic under the orders of Jedi Master Sifo Dyas, who had been killed a decade prior.
It turned out that Count Dooku (as Darth Tyrannus) manufactured the plan under Darth Sidious’ orders and recruited Jango Fett to be the genetic template for the clone army.
However, Jango Fett refused to accept any credits or some other form of payment, he only had one condition — a clone for himself, an unaltered one at that.
That clone became Jango’s son, Boba Fett. Because he wasn’t genetically modified to have accelerated growth like the other clones, he’s still alive during the time of The Mandalorian.
Years before the prequels, Jango Fett fought in the Mandalorian Civil Wars and was gifted the beskar armor.
Through the chain code embedded in that armor, it’s revealed Jango was a foundling, just like Din Djarin. This is why Mando accepts Boba Fett as the rightful owner of Jango’s beskar armor.
Knowing that he’s a foundling explains why Jango Fett wanted a clone for himself; he wanted a foundling of his own to raise, someone to carry on his legacy.
Part of the Mandalorian culture includes continuing legacies. However, Mandalorians don’t believe legacies have to be continued by blood relatives, which is why they emphasize adoption.
To Jango, he took in an unaltered clone from the Kaminoans, whom he named Boba, so he could have his own son.
This way, Jango continues his legacy by taking in a foundling, just like he was a foundling.
Jango Fett wanted a clone son was because he didn’t have a family, so he made one of his own.