Why do people take Vyvanse/addy as a street drug?

Recently I was diagnosed adhd (22F) doctor gave me 30mg Vyvance. The medicine makes me very calm the moment it kicks in like I can gather my thoughts and I can just sit and actuallly relax the getting up and actually doing stuff as planned hasn’t fully kicked it yet cause I’m still getting use to medication.

I told my friend and she really wanted to buy it from me even though she takes anti depressant meds/anxiety meds. Basically she doesn’t have ADHD. I obviously said no and when I asked her why she explained it’s supposed to be like being on coke. Never tried coke before she hasn’t either but coke/crack in my head means something completely different then what I’m feeling. I just don’t get the hype.