Having grown up poor, its really hard to "get rid of a perfectly good .......". My grandmother would be horrified; you don't get rid of stuff, what if you need it? (her voice in my head).
Like you, I decided that I was just one hobby overloaded. I boxed up, and got rid of all my cross stitch stuff, because I had lost interest, and just couldn't face the tedium of sitting and stitching. While it created space for another hobby, I feel lighter, and less constrained. I figured, I was doing this hobby, because "its a waste not to". Now, I realise that I can apply the same approach to my other hobbies. I don't have to sew everything I can ..... I can just sew everything I want to. I could probably sew a bra, but I don't want to. I could probably learn to knit more than squares, but I don't want to. I could learn couture techniques, but I don't want to. I don't see anything wrong with exercising the skills we already have. Why stretch ourselves to always learn more. More isn't always better.