BIPV in particular has certain pros:
Cost effectiveness
Integrated photovoltaics serve the function of the traditional building material they are replacing (eg cladding or roof tiles), meaning you save on buying those materials but do pay extra for the PV components and electrical installation. The system does of course generate free electricity, which gives its return on investment. Some types of BIPV, such as solar glass, also bring additional savings through their insulating properties.
Design
By weaving PV into the design of the building, you can add architectural interest through striking solar glass or shading structures. You also have a lot more flexibility in the design, since the panels can be manufactured and installed to be as discreet as possible, or built as their own design feature that highlights a commitment to sustainability.