Your "truth" is just the opposite.
You need look no further than this very forum to see the content of threads from players who have been kicked, or to other threads containing screenshots posted of various people entering dungeons in gear that is sometimes over 100 ilvls under what they should be wearing or containing the wrong primary stat.
A tank can stack all the parry they want, yes but luckily all parry gear also has VIT on it. Stacking all DEX or INT gear however would be a terrible choice just as it would be for a DPS to stack VIT gear and there are cases where players do exactly that to fudge ilvl.
Additionally according to the GM guidelines you can be kicked for just about anything as far as "differences in playstyle" are concerned but you aren't likely to be kicked from anything short of raids for lack of melds and even then it isn't likely you're going to be kicked for melding IV's instead of V's
You can still be learning and be massively below where you should be.
If you are in a learning party and your damage is low enough to hinder the progression of the 7 others in the party and they wish to remove you as to increase their odds (unlikely but possible), you cant force them to continue wanting to play with you.
Eat the kick and move on.
Maybe you get better and it doesn't happen again? Maybe you weren't really the problem and it was just that party? It happens.
Why does it have to change the mentality of all parties playing that way?
Are you trying to change the way every single person plays or are you trying to clear / farm the content?
Once again go make that "Skipping soar not required" party or that "Soar learning" party let it fill with people who dont care about skipping soar; get your kills, your weapons, and your bird and have a good time.
Who cares what the other parties are doing? Is it up to you or anyone else to police the entire PF?
If enough like minded players decide that they dont care about soar and wish to put up PFs for it then the PF will be full of those parties.
It really is that simple.