Perhaps without all the slips it would have sounded somewhat concert-level.... But listen to any pro pianist to hear the big difference. I don't believe any amateur can get anywhere near a professional.

I have played this piece for a long time but only seriously worked on it with my teacher for the last couple of months (3 or 4 lessons I guess). Now that makes all the difference. I wish there was time to rehearse everything like that.

But all pro pianists were once amateurs.