All White Leaves on Plants that are Variegated.

[Cymbaline]

So many times I read from people who say to cut off a leaf from a plant because a plant is using energy to support the plant.

I don't believe that for various reasons. 1) It doesn't make sense and 2) I've read from experts and been told by experts ( aka Roberta for example ) that , this doesn't make sense since a leaf is there to photosynthesis to provide energy.

Anyways so based on that fact. Leaves are there to provide energy I assume that also means it's not taking energy.

So regarding all white leaves on plants that are variegated and not supposed to be all white.

Being all white it means it doesn't have chlorophyll and doesn't photosynthesis to provide energy. This doesn't mean it's using plant energy to live right?

Usually they end up dying anyways so would cutting it off encourage the plant to create new leaves faster to replace it?

Thank You!