Before anyone wants to be contrarian about this: no one is going to stop you from using a stranger's weeb digital art as your profile pic. It is not illegal to use someone else's art for your profile pic without permission and no one is saying it's should be.
The point of this post is that this is an extreme overreaction to a conversation that concludes with 'pwease ask this other person for permission, the art is of their character design not mine 🥺' in a niche art community that operates on an honor system for the sake of being polite to one another.
oh hey, an entire thread validating my apprehension to selling art online