Is there a recognized rule set that allows pattern racking? Most rule sets specify for 9-ball that the one must be the head ball and the nine in the center, the rest must be "random"; with some tournaments requiring the two in the rear. What would be the advantage of attempting to use patterns, when you'll just be shut down when your discovered.
Well not all players play tournaments, some just gamble. Seldom gambling is it rack your own so honestly pattern racking has its roots not in making an easy out for yourself in rack your own but making a difficult out for your opponent.
Putting the 2 behind the 1 so it stays locked up near the rack. Hiding spot balls when you're giving weight. Racking in a pattern so your opponent has to go coast to coast over a set of 3 balls from the 4-6 in the rack increasing odds in your favor of turning the rack over to you in the middle of the rack essentially leaving you playing 4 or 5 ball every rack.
I knew guys that eventually took it a step further practicing the patterns for the racks they gave to their opponents to negate spot balls or to exploit certain weaknesses in their opponents games so that when their opponent falters they zip through for an easy out. There's a million things to know in this as where your opponent broke from changes everything.
Rack your own is the craziest thing I've ever seen & I don't understand how or why it came about & players that pattern racked to negate spots or take advantage of opponents weaknesses started using their knowledge to assemble racks for themselves for obvious reasons. Dennis Orcullo showed me the pattern I posted earlier in this thread & its advantageous in rack your own if you break from a particular spot.
The bottom line is it all comes from one source. There has never been any money in this game for players that have dedicated themselves & a lot of time, sometimes their lives to reach an elite proficiency at it which is why it's always had ties to gambling as it was the only way to make any money at it & that isn't easy either once you reach a certain level where you can't get a game or gave to give up so much weight it becomes impossible to outrun it.
I'll liken it to food, if you're starving you'll do some fairly nefarious things to insure you eat. If you're well fed, you won't go to those levels, there is no need. As long as $ remains scarce in the game this will continue.