Well maybe in Russia trains are still considered too unusual hobby to be totally okay with but many "normal" people actually kinda
like trains (not as an interest but just sorta peace of mind) so it is unlikely you will be treated like a nutjob should anyone find out about this hobby. It is more likely some slight misunderstanding rather than plain arrogance.
But NO ONE actually can logically justify why they think it is… not an obvious interest even though regular cars or planes are totally fine in everyone's eyes! And this is the common trait between both hemispheres, am'right? Only one familiar girl of mine actually managed to give somewhat of a logical explanation to this and the funny thing she is totally okay with the foaming.