As cringey as that looks, what are other options there? Windows' desktop (and neither Linux's IIRC) doesn't have a built-in "stick-it note" functionality — which is kind of a shame if you really think about it.
There are a couple sticky notes programs that appear to be in the Ubuntu repos at least. I guess it isn't "built in" in the sense that it comes pre-installed on install disk, but it would be installed in the same way as any other first-party software.