The key is to see whether the theme corresponding to the protected structure and method is based on the same inventive concept. For example, the method must be realized by the corresponding structure, so at this time, both of them can be applied as an invention theme, which can protect both the method and the structure. If you apply separately, the previous application will damage the creativity of the later application.
On the other hand, if the two are not the same idea at all, then there is no need to worry about destroying creativity.