Bureaucracy costs time.
Last time I wanted to extend my visa in Thailand on a Friday it was closed. The next week it was closed three days so I could not get the extension in time. I left the country to avoid to pay for overstay.
Now I have a new visa and wanted to get an extension early. But on the immigration I was told I should do it around the last week of my visa. An unnecessary thing which costs me nearly another day to go there and back.