So it's only YOUR scholarly experts that YOU agree with who we should believe!
We are using dictionaries and concordances not just some guy's opinion. Biblical Greek is a fixed language which means definitions cannot change with time or culture. Denying the offcial meaning means you cannot be taken seriously on this topic. The meaning of Apostasia is fixed for all time and this is what it means:
Strong's definition G646
apostasia
ap-os-tas-ee'-ah
Feminine of the same as G647;
defection from truth (properly the state), (“apostasy”) : - falling away, forsake.
Total KJV occurrences: 2
Thayer Definition:
G646 apostasia
1)
a falling away, defection, apostasy
Part of Speech: noun feminine
A Related Word by Thayer’s/Strong’s Number: feminine of the same as G647
Citing in TDNT: 1:513, 88
Total KJV occurrences: 2
Abbott-Smith Manual Greek Lexicon of the New Testament
Apostasia
defection, apostasy, revolt; in late Gk. (MM, Exp., viii; Lft., Notes, 111; Cremer, 308) for cl. ?p?stas?? , freq. in sense of political revolt, in LXX (e.g. Joshua 22:22, 2 Chronicles 29:19, Jeremiah 2:19)
and NT always of religious apostasy: Ac21:21, II Th 2:3.
Liddell and Scott:
A defection, revolt, v.l. in D.H.7.1, J.Vit.10, Plu.Galb.1; esp.
in religious sense, rebellion against God, apostasy, LXX Jo.22.22, 2 Ep.
Th.2.3 .
Winer's Grammar:
Apostasia,
a falling away, defection, apostasy; in the Bible namely, from the true religion: Acts 21:21; 2 Thessalonians 2:3 ; ((Joshua 22:22; 2 Chronicles 29:19; 2 Chronicles 33:19); Jeremiah 2:19; Jeremiah 36
29) 32 Complutensian; 1 Macc. 2:15). The earlier Greeks say Apostasis; see Lob. ad Phryn., p. 528; (Winer's Grammar, 24).
The only other use of this word in the bible was people departing from the teachings of Moses which is an Apostasy from his teachings. Neither use has anything to do with simply going somewhere physically.