One of the easiest ways to weaken a good image is to keep improving it after it already works.
There is usually a moment when the light feels right, the skin looks clean, the color is balanced, and nothing important is distracting. The image is already there. But because retouching is still technically possible, it is very easy to continue. A little more cleanup. A little more smoothing. One more transition. One more small correction that seems harmless.
The difficult part is that none of these decisions feels wrong while you are making them. Most of them actually make the individual area look better. The problem appears when all those correct decisions begin to accumulate. Skin becomes too even. Light becomes too controlled. Small irregularities disappear. The image gets cleaner, but less specific.
This is something I notice much more now than I did earlier in my career. Technical skill teaches you how to change almost anything. Experience teaches you that the ability to change something does not automatically make the change useful.
Good retouching needs variation. Some texture should remain. Some transitions do not need to be perfect. A shadow may look slightly uneven because real light behaves that way. A small detail may not be beautiful on its own, but removing it can make the whole photograph feel more artificial.
Over-retouching rarely happens because someone suddenly makes one dramatic mistake. More often, it happens quietly, through a series of reasonable corrections applied a little too evenly.
That is why stopping is part of the work.
Not stopping because you are tired, or because the deadline has arrived. Stopping because the image no longer needs anything from you.
Knowing how to retouch matters. Knowing when the photograph is already finished matters just as much.