Why does installing a game/program sometimes take several hours, but uninstalling usually take no more than a few minutes?
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You take a blank canvas and make a painting. You name it “Program” and it takes you many hours.
Eventually, you decide you don’t like Program anymore, but you don’t want to waste canvas so you just get rid of the name tag.
When you go to make a new painting, you take the canvas that uses to be Program and paint right over it. It doesn’t matter that it was once Program, cause the new paint covers it up.
That’s what your computer does. It doesn’t need to delete anything when it uninstalls because, when it goes to use that memory, it will have to set every bit regardless of what it already is. This is also why people can recover data, they just go through your blank canvases and rename the ones that already have paint.
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