As a person that can actually get into jp groups, yeah no issues.
But Ive seen/heard more than a reasonable amount of people not being allowed to join jp groups.
I can see the want for splitting them up.
I don't use windower, therefore I can't type JP. I know a bit of romanji, but lately I just auto translate all things.
I can understand JP shout but not their convo in /p, since the sentence structure in shout is much easier to understand than when they are having a conversation. So that all the advantage that I have over another guy that reads zero JP.
I would say about 50% of JP would reject me, but certainly not all. Some JP are actually fine for easy stuff like ambuscade. After a while it's easy to learn who will invite NA and who will not, and it got easy to avoid JP onry shouters.
Its also depend on job. Roles like DD we just engage and hit things. Jobs like RDM or tank, there's always a chance to *** up if they use different strategy. Sometimes I just add a couple of sentence in tell to show that I know what to do, like "RDM <do you need it>, <sleepga> ok."
That being said, even if someone never get jp pt invite nor able to read shout content, at least JP players still provide a source of manpower for PUG leader.
Case to the point I was doing ambu yesterday and we were 5/6 missing a healer (usually the hardest role to find), it was late so we couldn't get any NA. We just shout and got a JP whm in less than 5 min. The fact that late PST time is evening JPT means there will be people available to pick up at that time.