Tity is a good hitmaker but if the hits stop, so does her career. Gaga was able to try a different genre and patch the stains of her public image and her raw talent alone has kept her going without the need to constantly put out singles/hits. She has things to fall on when things go wrong.
98% of the success that people like Tity and Rihanna have is based on their hits. Music execs know if those stop, so do they in general.
