That's the right reason to share your models, you made them for fun and you won't be mad if someone uploads it even on the other sites cause you didn't put much effort in making those models. But, when you are making the model for a month or even more, it won't be very easy for you to share that model with someone else because you want to keep it for yourself, private. But, you are right in some way, the people nowadays don't really believe that we put much of our time in making models, they just comment:"it's bad...".
But in the other way it's simply selfish to keep models all by ourselfs(modelers). It's not that I want to have more reputation or to be more 'famous' on the site, I just love to share my models, to see whether people like them or not, what they think about them. And remember, the more modls flwe made the more campaigns we will see.
That's why I'm telling you all this, but it's your opinion, man, and I appreciate it, and I wish you all the best and who knows, maybe someday you'll be the hero that Hive needs, as you only made some Heroes from the past, or future.
About the work, I know it's hard, but you got the job man. In our contry even with two colleges you can't get job. I wish there were a game company in my country, I go to college that I do not love and tommorow even if I get a job I won't do it as it should be done because you do what you love and I admire you for that. Maybe in the next life...