You’re missing the point. To the extent these things are true (unclear why an artificial environment would have less need for fertilizer), they’re true about or

You’re missing the point. To the extent these things are true (unclear why an artificial environment would have less need for fertilizer), they’re true about ordinary greenhouses. So what does verticality add other than complication, and why is it so valuable for “dense urban areas”? Do any of the gains you propose make up for the enormous loss of free energy from the Sun? So far, in real life, the answer is a resounding no.