The 2025 Monster Manual, "not actually magic," and how this affects PCs

The 2025 Monster Manual has a wide selection of NPCs who, while flavored as mystics of some kind, do not rely on magic or spellcasting for their combat options. There are no more provisions about "This magic..." or "spell attack," so when that CR 8 elemental cultist hurls an Elemental Claw at you, when that CR 8 death cultist performs a Spirit Wail, or when that CR 8 aberrant cultist afflicts you with Mind Rot, none of that is considered magic or a spell. It cannot be affected by Dispel Magic, Counterspell, or Antimagic Field.

In a high-level battle against CR 8 elemental cultists, death cultists, and aberrant cultists, the only enemy combat ability that can be affected by a PC's Counterspell or Antimagic Field is the aberrant cultists' own 2/day Counterspell.

What are your thoughts on this paradigm?