In the manga it was never specified how Indra awakened MS, but in the anime he killed his two friends for it. So yeah, if Sarada awakens MS in the same way as Indra (or any other Uchiha), she'll have to either lose someone or kill them herself.The same way Indra unlocked it are you firgetting she's the daughter of the sage of 6 paths just as he was the son of the sage of 6 paths.
As for the Jogan that's just bad writing and a handout for the purpose of plot.
Being Sasuke's daughter won't save her from having to feel the pain of loss in order to awaken it. It may however, save her from going blind from it (just like with Indra).
Also, Jogan is neither bad writing nor a handout. It actually makes sense that Boruto got something like that. After all, his father possesses Hagoromo's chakara and the chakara of all 9 bijuus. His mother is a Hyuuga with Hamura's chakara.
Hagoromo chakara + Hamura chakara + bijuu chakaras + Hyuuga descent + added bonus of Uzumaki descent has to count for at least something in the offspring.
At the very least Boruto should have gotten byakugan due to being the son of a Hyuuga, but the Otsutsuki/bijuu chakaras make it feasible for his eye to be something related but unique from the byakugan.
Either way though, with the combination of all that Otsutsuki/bijuu chakara and Hyuuga/Uzumaki descent, it would have been absolutely stupid (practically robbery almost) for Boruto to get absolutely nothing from this.
Long story short: Jogan is not a handout. It's a sensible KKG for Boruto to have.