Specialties listed are examples, not an exhaustive list.
Please source that claim
A) it's been that way since Ed 3 (IIRC)
B)
Check f.E Pistols
------------------
Pistols
This skill category includes all types of handheld pistols,
including tasers, single-shots, semi-automatics,
and revolvers.
Default: Yes
Skill Group: Firearms
Specializations: Holdouts, Revolvers, Semi-
Automatics, Tasers
-------------
Hold-Out and Taser as special.,but not Light Pistols or Heavy Pistols ?

or Hacking
There is no "Hacking on the fly" even though the Decker Archtype has it
Hough!
Medicineman