Does the use of design systems and interaction design patterns stifle creativity in interaction design? No, they support your creativity, protect you from the chaos design.
With the design systems and interaction design patterns, designers can focus on solving complex problems rather than reinventing basic elements (like buttons or forms), and achieve increasing the efficiency. Moreover, with a predefined button style, you spend more time on the unique flow or experience. The consistence element designs could reducing cognitive load, so users are benefit from familiar patterns, and designers’ creativity can focus on improving the experience rather than teaching users new systems.
At the same time, as a designer, we should not over reliance on patterns, feel restricted by the “rules” of the system, avoiding risk or experimentation, and finally kill our creativities by ourself.