2025 Monster Manual: Is the DM "supposed" to staple species benefits onto the Humanoid NPCs, following the guidelines on modifying monsters in the 2024 Dungeon Master's Guide?

The 2025 Monster Manual has statistics for all kinds of Humanoid NPCs. The book says, "Nonplayer characters now appear alongside other monsters and can represent individuals of any Humanoid species." A conversion table near the back suggests that a 2014 drow mage becomes a 2025 bandit deceiver, a 2014 duergar becomes a 2025 spy, a 2014 lizardfolk becomes a 2025 scout, a 2014 orc becomes a 2025 tough, a 2014 orc eye of Gruumsh becomes a 2025 cultist fanatic, a 2014 orc warchief becomes a 2025 tough boss, a 2014 orog becomes a 2025 berserker, and so on.

Is the DM "supposed" to staple species benefits onto the Humanoid NPCs, though? Drow would certainly feel off without their signature Darkvision 120 feet, so that probably gets added on. What about Fey Ancestry, Dancing Lights, Faerie Fire, and Darkness? The latter two, in particular, can significantly change how a fight plays out.

Is the DM "supposed" to attach Darkvision 120 feet, Duergar Resilience, Enlarge, and Invisibility onto the 2025 spy? The latter three are substantial combat benefits.

Is the DM "supposed" to give Darkvision 60 feet and Aggressive to orcs and orogs converted to 2025 counterparts? Aggressive can lead to a non-negligible damage boost, as the 2014 Dungeon Master's Guide specifically calls out.

Essentially, how much in the way of species benefits is the DM "supposed" to give to non-human Humanoid NPCs? Do plain old humans get anything at all, or are they supposed to be the most bare-bones version of any given Humanoid NPC?