Why is this an issue?

95% of things that you need to do in the open world, you can solo - the exception would be S rank hunts aswell as the special FATEs.

I understand that some people like games that have a focus on huge open world content - but FFXIV isnt one of those games. Hasnt been since 2.0 at least - I cant speak for 1.0 since I've never played it, but I guess we can all agree on 1.0 and anything past ARR being two different games.
So yeah, if you're looking for an open world MMO, FFXIV isnt that and never wanted to be that. Its not broken, its by design.