Channelknight Fadran

every latin language is a group of children under a gym parachute pretending to be a lava monster whilst continuously brawling for their favorite spots and to get everyone else to follow their lead.

Quote

I am subtly inquiring as to why one would assume a fantasy language should adhere to modern lingual charts instead of in-world dialect evolution

I am subtly inquiring as to why one would not use the scientifically recognized symbols for every sound in spoken language when making a pronunciation guide.

Because the pronunciations in question are not based on a largely latin-based syllabic system.