It sounds like you're coming on really strong with this friendship angle. She doesn't sound equally interested in that, if at all. Despite what some bios say, people don't typically enter Tinder looking to make new friends.

Your insistence to make things work as friends might come off as a little desperate, and maybe also as a long-con to get together with her friend.

Telling her that you don't see romance potential but you see friendship potential was not an idiot move. It was genuine and honest. But she's not obliged to want the same. The true idiot move would be to close your eyes as to what she's doing with the ball that you've put squarely on her side of the court.