Exactly. I don’t know anyone who can’t read their own writing.
I had reached that point in college. I clipped the nib of a (real ink) pen, and made an italics pen out of it. That forced me to write more neatly in order to avoid just putting a blob of ink on the page. To this day, unless I am looking into the microscope when I write and track over a line twice, I can usually read what I write, and others can, too.