Acceptance shouldn't really be an issue in the art community. Art is art, and all that matters is whether or not you accept your techniques and don't care how many people think it's silly. You just enjoy yourself and don't let such small details worry you.
I don't see how it's a bad thing so don't worry about it lol. Pretty sure there's few people here who uses Colors 3D as their preferred media so you're not alone!
Why wouldn't it be acceptable? I use Colors3d since I don't own a tablet. I dislike the limited tools and tiny canvas sizes, but it's better than nothing.