Sometimes we realize too late that it is no longer possible to stop.
You give yourself a task, grossly underestimating the time needed to complete it and when the error of evaluation becomes evident it is, exactly, too late: you have already invested too much in a job that, among other things, seems to be not too bad. You keep on to the bitter end, therefore, with no further calculations.
I do not know how long it took me to finish the image, I propose on this page. Weeks. Probably too much.