Interesting viewpoint, I am a tango traveller as a dancer and DJ (33 weekends in 2017). I have nowadays little to do with my local scene. I though, am not feeling guilty or think my absence makes the slightest bit of a difference. You have to travel to improve, to grow and learn as a dancer. Yes, you are right these people ‘neglect’ the local scene. I would not worry though as there will be a time when all travellers can no longer travel and they will return. They might despair and try to improve the local scene, they might miss their friends and organise an event to bring others thus growing the scene. like in Societies.. emmigration and immigration has it’s benefits. If your situation prevents you from travelling there is still much to be enjoyed locally. You do not have to be a traveller to bring the party to you, you just have to know travellers to act as ambassadors, maybe organise something yourself?