People make mistakes. And no, it's not a unique case. They make mistakes again and again. You have definitely noticed at least several mistakes of others, haven't you? A key principle of any system is that the system is not perfect, but is always compared to the ideal. So it is logical to assume that there must or at least can be some deviations or mistakes in it.
By allowing someone to make mistakes we can focus on what is really important to us. If you need to learn some new dance combination of steps and moves during a class and your partner doesn't seem to be perfect – it's great! Because in real life on a milonga you will certainly dance with another not perfect partner. So it's good for you because when you finally learn how to dance this combination with your not perfect partner you will be far more confident with the others on milonga.
We have absolutely no culture of dealing with mistakes. More precisely, the dominant point of view in our society says that mistakes should not exist. A lot of resources are spent to monitor bugs, errors and mistakes and to react to them. And since the errors are treated as a negative phenomenon so the reaction to them corresponds to the well-known model of accepting death by Kübler-Ross: denial, anger, bargaining, depression, and at the end acceptance.
We can try to skip all the negative stages and come directly to acceptance. It might liberate us and release from the guilt for being ourselves and being not perfect and far from perfection and the ideal we imagine or someone dictates us to be.
And if earlier after making any mistake you immediately found yourself drowning in negative emotions, it is now possible to notice a mistake and start thinking instead. Is it a real mistake? If it is, does it affect somehow your current goals? If it does, is the impact huge? If it is huge, what can you do in this case?