Why not just add instanced housing?

[Niwashi]

Airships will be available for people outside of the FC and people that are in the FC but don't have worship rights.

Will they? I must have missed that. (I've got a personal house, but my FC doesn't have a house, so I've missed out on all the FC specific stuff so far. I'd love to have a personal workshop.)

Ill be honest if they simply added a garden patch in the from of a Flower pot(s) or one of those wooden gardening boxes being able to be placed in our personal FC room.
...
I am still surprised why they never added a small garden to the private room to begin with or a closed veranda (greenhouse) attached to your personal room >_>

Guess it has something to do with the plant timers I guess but such a pity

Plant timers wouldn't prevent their being in an instanced area like the private rooms (or a full sized instanced housing area either). Plant timers can already handle the instance being shut down and then re-started later from stored data. Currently that only happens during server maintenance, but that's often enough to prove SE has already coded how to make it work.

Stored data for a garden plot would need to remember what's planted there, when it was planted, when it was last fertilized, and when it was last tended. (It might also remember the total number of times it's been fertilized, but the simpler way would be to just adjust the time planted variable each time you fertilize it to make it appear further along in its growth cycle.) It's information that normal furnishings don't need, but it's only a limited amount of additional information.

And yes, I'm surprised it's not available in private rooms yet, too. A little private greenhouse area would be a great addition. Or even just an indoor planter with room for a couple plants. (The gardening system is too strongly based on intercrossing for single pots to work. Two plant beds would be the minimum, and be a reasonable size for an indoor planter box.)

[Raxxon]

Will they? I must have missed that. (I've got a personal house, but my FC doesn't have a house, so I've missed out on all the FC specific stuff so far. I'd love to have a personal workshop.)

I think this refers to people being able to explore the airship islands even if they don't have an FC with airships. You take an airship from Ishgard instead

This is the only thing I can remember reading about airships for non-house owners