The vast majority of profession artists I know and love have a Bandcamp account. Maybe in the early stages musicians just want feedback on their new "beat". However, at some point they want to have a professional looking profile with releases that they can sell, with a community they can reach out to, merchandise they can roll out at their own pace, etc etc.

You are probably talking to very early stage musicians who would enjoy using Soundcloud over Bandcamp for feedback reasons.