When I initially joined Adobe I thought that sufficiently mature prototypes are required for selling to the product partners, but some recent experiences taught me that it is possible to drive progress (including eventual product transfers) via rapid iterations and demonstrations.
The key is to have sufficiently convincing presentations on the most relevant aspects without spending too much time optimizing elsewhere, which depends on good judgement and prioritization on what and when to focus on.
During this process, we can be more comfortable taking on tasks that are uncertain, ambiguous, and beyond our current expertise if we can leverage the collective strength of a strong team, which requires good project management and tech leadership.