Well, to start, you're literally saying "to deal with this particular symptom of depression, just don't have that symptom." That's extremely invalidating and completely denies the nature of depression as a condition. It's not something you just "get over" or "stop having." If it was that easy, a depressed person wouldn't need this advice. Getting started is very often the whole problem.
Ah, let me reframe what I'm saying. This is meant to apply to any task, including getting out of bed and going to the bathroom.
The advice is to break the goal down into the smallest possible pieces and start there. For getting out of bed, I'd probably start with rolling onto my side.
It's not a cure. It's not guaranteed to work. It's a strategy for expending as little energy as possible to get started. If you can focus on one small, actionable item, it can help reduce how overwhelming the entire task feels.
If you don't have the capacity to do something, there is no advice that will make that thing possible and no one should be expecting you to do it.