The spec has about 30 000 characters. Divide this by 60 characters per line leads to 500 days. This is 1 year 4 months and 15 days. Of course, I can read more than just one sentence a day to speed the process up. But the goal is just 1 line per day.
Big tasks are hard to master. Perseverance is key. If I want to finish reading the spec I need to make reading a habit. This can only either achieved by strong willpower (which is difficult for me as father of a newborn) or by starting it gradually with a minimally exhausting task per day (it is hard for me to argue that 1 line of code is too much to read at any given day)
It's actually possible to read the whole spec in a reasonable amount of time.