A window of opportunity

When I rented the shop in the smallsville mall, it seemed that the back wall was, well, a wall. It was painted white and had the previous owner's logo emblazoned on it. So it had to be a wall, right? Ha! My plans of attaching a big whiteboard to it were soon shelved when I discovered it was a huge window, approximately 2m x 2m! So, I've been scraping the paint off the last couple of days and it's been driving me mad.

Why the fuck would you paint over such a big window? It just adds so much more to the room. OK, if the sun is a bit blinding at a certain hour, surely you'd put some blinds up? Is this Israeli logic at work or is it me being stoopid?