I will pop in here for an unusual quick Tuesday entry to answer this question. I saw this stroke on YouTube and the debate in the comments was whether or not it was a fluke. I think anyone with any Snooker intelligence at all will now see that it definitely was not a fluke and in fact to answer your question, Holden, there is an entire subcategory of players who would see and play "a shot like that". They are called English Billiard players.
The most important part of the stroke of course was the shot to nothing aspect of it to put White well into Baulk. But as any English Billiard player, even a fledgling one, will easily see, the Red he played at lies on a natural in-off line between the middle pocket and the Spot. This is English Billiards 101....a ball traveling this line making half-ball contact with a ball on the Spot has a high percentage chance of going into the top pocket. I would suggest that Mark Williams has played some Billiards in his time and can see these natural lines easily.
Anyone who plays the Game looking to improve would do well to take some time and learn at least a little bit about English Billiards. It will improve your game immensely, particularly cue ball control.
Edit: I just noticed....it's Monday. Worked all day yesterday, been missing nearly all of the WSC, so my brain isn't working correctly. I need to relax with some snooker. Hopefully a short game tonight.