747passion, there is a difference between an Emergency & a Non-normal situation. 3-engines is a "Non-normal" situation, not an "Emergency". What this means is, reduced redundancy exists and full operational capability is no longer available, so his options are now more restricted but it is not (yet) a Land As Soon As Possible situation. But, the airplane is not yet immediately under threat.
This is the difference between a Mayday and a Pan-Pan.
You may pontificate all you like, but the fact is that if in every airline that i have flown for, if you took her to an unsuitable airport/emergency airport & got the airplane stuck there for weeks on end for something that is not an emergency situation, you would be shown the door. If his engine was burning away with an uncontrolled fire etc, that would be another story. A straight flameout is a different matter.
In this case, are you actually suggesting that you would have him put the airplane down at an airport/runway that cannot take his airplane?
Please answer simply - a "yes" or "no" would suffice.