Stat blocks are a shortcut...you realize that right, they're for making a lot of mobs quickly to fill out the ranks. They're unfinished, you can make modifications to them based on...
To your (rhetorical) question, they do change if the class, race and alignment change. Or do you think a NPC is Any Alignment...you're supposed to supply the alignment, even if it's in the moment. You've been adding Humans to your campaign cosplaying different races without knowing it, and that's kind of the problem.
Case in point :
COMMONER
Medium humanoid (any race), any alignment Armor Class 10 Hit Points 4 (1d8) Speed 30 ft. STR 1 0 (+O) DEX 10 (+O) CON 1 0 (+O) INT 1 0 (+0) WIS 10 (+O) CHA 1 0 (+O) Senses passive Perception 10 Languages any one language (usually Common) Challenge 0 (10 XP) ACT I O N S Club. Melee Weapon Attack: +2 to h it, reach 5 ft., one target. Hit: 2 (l d4) bludgeoning damage.
Now you tell me, what race's unmodified stats are Str 10 Dex 10 Con 10 Int 10 Wis 10 Cha 10
Do you copy and paste statblocks in from the books? You can do that in a pinch but don't confuse that with an actual character
I'm beginning to wonder if you don't know what you're talking about or are being willfully obtuse.
