M
Im not sure what you mean. It int based on any misunderstanding and it isnt a diyuk on a Gemara. (though it certainly is correct)
The Gemara in Shabbos is more detailed than תנו רבנן מצות חנוכה נר איש וביתו on 23a it discusses what to do when not at home. 2 options are offered contributing with the baal habyis and relying o a wife at home
Rashi (a very recent posek?) Says regarding the beracha of Sheasa nissim העובר בשוק ורואה באחד החצרות דולק ומצאתי בשם רבינו יצחק בן יהודה שאמר משם רבינו יעקב דלא הוזקקה ברכה זו אלא למי שלא הדליק בביתו עדיין או ליושב בספינ’:
Meaning someone who is on a boat (and patur from lighting as he has no dira at that time) nonethless makes this beracha.
In One of the classic teshuvos on the subject the Marsham (very recent?) says a train is different as the seat is rented for the duration of the trip and thus is his dwelling. Arguably a plane is the same, but an airport is not. Sure it is possible he is mistaken an misunderstood the Gemara. though I have never seen anyone argue and I’m not sure what you are referring to when you say ” as is clear from an even casual reading of the Rambam, the mechaber”