No.
I am a sim player (who does play ARB for rewards and battlepass) and sim is not the “proper way” to play.
I will say back in 2015ish, earthunder did present air sim as its pinnacle of offerings but it kind of fell off. 2013-15 forum posts are quite interesting in people even wanting mouse aim gone from historical battles.
Anyway.
People should play the mode they want. They should be encouraged to experiment and try other modes out. However they should not be forced to keep playing modes they do not enjoy (if sim had decent rewards and affordable spawn costs, id likely spade my fighters in it over arb.)
Anyhow.
Arcade air warthunder is its own game. If you move on to air realistic, it is going to be a very very different game. It used to be much more different in the past when objective design and airfield placement was smarter and matches could last for longer, and i feel the idea of pushing arcade players into arb has contributed to its arcadification.
If you push aab/arb players into sim not because of the playstyle (you enjoy slow paced, heavily positioning based air to air combat and purposeful groundstriking and bombing gameplay and semi-historical lobbies and flying without instructor and in a cockpit)… but because you shame them for playing “inferior” game modes and demand they move on to playing sim…
Do you know what will happen? People will conplain about the playstyle. People will conplain about having to compensate for prop planes rolling and yawing and needing to be fought. People will complain about distances flown and gunnery difficulty. People will conplain about markers.
We will get the same complaints that led to the arcadification of ARB and will lead to the ARBification of air sim.
You should ideally only play a mode if it appeals to you. Not because of misplaced pride or being forced.