Sport climbers tend to make their bouldering projects into technical problems: dissecting every detail to make the climb as easy as efficient as possible.
Conversely, boulderers make the routes a purely physical challenge: answering failure with increased effort over and over until their fitness improves.
Simply doing a new activity fails to guarantee a change.
The breakthrough happens when the sport climber pretends to be a boulderer and adopts their habits of resting more, trying harder, and bearing down; or when the boulderer learns to relax, rework sequences, and breath.
Not in what we do, but in how we do everything.