How to alter traits, perks, or needs?

How exactly do some people use Sims 4 Studio to alter traits, perks, or needs? I'm confused. I went over the whole online manual and am looking around everywhere on the program, but I don't see anything where you can change traits, perks, or needs. All it has are Animation, Build, CAS, and Object. Opening any of those sections is just in game objects, clothing, etc. How are people able to find the traits, perks, or needs in Sims 4 Studio? I'm finding mods where the author(s) lists Sims 4 Studio as the ONLY program they used to create their mod. They don't list anything else such as S4pe or anything. Soo... I'm like wtf, how are people making mods like this with only Sims 4 Studio? Am I missing something? I read the manual and it just goes over all the objects, clothing, CAS, meshes, and animations.  Nothing about traits, perks, or needs. I tired browsing around YouTube for tutorials to use Sims 4 Studio to alter traits, perks, or needs; but I only come up with other mods for it and/or using already in-game cheats. Is anyone able to help me out? Or point me to a tutorial/manual that explains how to alter traits, perks, or needs with Sims 4 Studio?

An example in case one needs it, there is a simple mod I found that alter just one thing.
It Modifies:

E882D22F!00000011!0000000000024A04.Idle_Vampire.InteractionTuning.xml

There is another mod that alters more such as:

0C772E27!00000011!00000000000253F2.loot_Weaknesses_UncontrollableHissing_React.ActionTuning.xml
0C772E27!00000011!0000000000025415.loot_Weaknesses_UncontrollableHissing_hidden.ActionTuning.xml
545AC67A!0017E8F6!00000000000253DB.buff_Vampire_Weaknesses_UncontrollableHissing.SimData.xml
545AC67A!0017E8F6!0000000000025414.buff_Vampire_Weaknesses_UncontrollableHissing_Hidden.SimData.xml
6017E896!00000011!00000000000253DB.buff_Vampire_Weaknesses_UncontrollableHissing.BuffTuning.xml
6017E896!00000011!0000000000025414.buff_Vampire_Weaknesses_UncontrollableHissing_Hidden.BuffTuning.xml
DEBAFB73!00000011!00000000000253F0.broadcaster_Weaknesses_UncontrollableHissing.BroadcasterTuning.xml
E882D22F!00000011!00000000000253DC.idle_Vampire_Weaknesses_UncontrollableHissing.InteractionTuning.xml
E882D22F!00000011!0000000000025402.reactions_Vampires_UncontrollableHissing.InteractionTuning.xml
EC3DA10E!00000011!0000000000025298.vampirePerks_Weaknesses_UncontrollableHissing.BucksPerkTuning.xml
EE17C6AD!00000011!00000000000253D9.Vampires_Weaknesses_UncontrollableHissing.AnimationTuning.xml


I'm trying to figure out how to get to files such as these with Sims 4 Studio to edit them.  The creators of these mods and the alterations they made say they only use Sims 4 Editor.