Limited supply.
Most tropical fruits are imported from neighbouring countries!

Majority of Malaysia food are imported.
The rice flour & other ingredients for kueh are imported.

Msia don't have large fruits cultivation unlike other Asean countries. Lagi there is hardly any economy of scale or real long term gomen support for these sectors.

Fruits farming tak ada gaya, labour intensive, require long working hours, kerja mcm 3D job and mesti ada commitment for years/decades.
Young Msian do not see fruit farming as a good career thus they don't take up their parents' fruit orchard and many orchards are left idle.