True again, however, turnout would still be an issue, no matter how well liked the organized events are. And the stress level goes way up when the CMs are trying to get the thing going on time and the walk-ons that have no clue what is even happening want to join up and play 2 minutes before expected launch time.
Also, in CT, players will be able to expect missions with, as HiTech stated, "hundreds" of aircraft. Without AI to take the vacant spots, that wouldn't be possible to do on a nightly basis, or with new missions starting every hour.
To accomplish what CT should do by using only humans (for CMs, mission planning, order distribution, pilots to fill all expected slots, etc.) you would need a full time staff of paid employees.
Special events are fun, and are probably the best thing to actually get adrenaline pumping when playing a flight sim, but it takes too much effort to do large scale events on a regular (multiple times per day) basis.