Not just previous design decisions. Just to state the obvious, designers make choices and—like you said—those choices are guided by context, including core motivations. Core motivations can be business outcome drivers or discipline first principles. To create a functional society we're supposed to factor in ethics and morality in these choices, though at best the choices in a profit-centered product seem to accommodate ethics.
Do we focus on quick onboard, or do we allow people to learn and grow? How can we foster connection without the risk of even the perception of manipulation?
What does it mean for the things we make to be based on ethics-centered design decisions?
What does it mean to design and create in a just society?