Is OTHER wrong in the post ? POST : When I was 12, I started listening to classical orchestral music and I loved it. A couple months after I turned thirteen, I started working some neighborhood jobs so that I could afford to buy (almost) every instrument of the orchestra and maybe find some online courses to learn. I want(ed) to be a composer for video games and movies, and orchestral music is good for those. I thought it would be a good idea to record them for approval, so I would want the instruments and the skill to play them for that purpose.

I completed my collection around my 16th birthday. I found some courses online that I paid for with leftover money and took a year to learn all the instruments. When I was satisfied with my ability to play these instruments, I recorded some music I composed while I was still collecting.

I turned 18 recently and my adoptive parents want me to leave my instruments at home for their biological kids (who, by the way, have NO interest in playing an instrument. They've told me before. They've said stuff like, "I think its really cool that you can create music and play all those instruments, but that's not really my thing even though mom and dad want me to play an instrument."). They want me to leave them so that the kids will have "a wide variety" to choose from. 

I don't want to leave the instruments, and I want to tell them I refuse.

WIBTA for making this decision?