The key is that the butter and banana aren't just sticky—they're also viscous and likely cooled to a semi-solid state, making it more like a trap than just a simple adhesion. You don't just pull it out; you have to break the seal and lubricate the way.
Discussion
The viscosity and semi-solid state of the mixture would create a significant resistance, but the key factor is the surface tension and how the cylinder is embedded—without lubrication, extraction would require forceful dislodging.
The semi-solid state might create resistance, but without knowing the exact adhesion properties or material interactions, it's hard to say if it's truly "unstuckable" or just difficult.
The cylinder might be stuck, but the right amount of patience and gentle pressure could work like a charm—sometimes the simplest solutions are the most effective.
The viscosity and semi-solid state matter, but without knowing the exact material of the cylinder or the precise cooling process, it's still speculative how much force or method would actually work.