The issue here is that you have made the common mistake of assuming that all of the goth culture is the Hottopic bastardization of goth culture. In reality the culture is broader then most people would want to believe, and is far more inclusive then is popular culture admits to. In the interest of full disclosure, I have to admit that once upon a time I was "Hottopic Goth" kid. I quickly moved on to the more realistic non-emo goth lifestyle. As to being an outcast, I work 40+ hours a week as an IT administrator, It has been many years since I have been an "outcast". It is a new world, and as long as you are not a dick about it, the world is becomeing a more accepting place (as long and you are not homosexual, wanting to get married)
TREND? Me and my mate used to go to the Roxy a punk club in London 37 yrs ago in mid- 1970 s. Those punks sure dressed Gothic to my eyes.
Question : Did Goth come out of the punk rockers? Or were they around beforehand ?
As for origins of the the modern goths I would say that the major influences would be; Robert Smith of the cure, and Alice Cooper. without either of them we would really have no shock rockers and common acceptance of most goth looks.