It is a general observation from all the events and matches I started to watch since getting back into pool.
It used to be more "fast & loose." I guess it started with tighter pockets, so players took fewer chances, but now with this cut break, it's very hard to get a spread for a run-out. The most important thing is to pocket the 1 and stay at the table and then play safe if they don't have a shot, but it's more often that they don't have a shot. Could be on the first ball, could be on the second or third. Once the match is not with a top 10 player, you see it more often—safe after the break. A 750 Fargo player should run out more often than they do these days.
Nice post.
I think you've got it 100% right that the game has trended in this direction, and certainly the use of four-inch pockets has much to do with why players are opting for more defense. I've often argued that 4 1/4" pockets would be preferable, but obviously those at Matchroom disagree.
Still, the other thing to consider is the super-narrow break box in use in the Matchroom majors. At Derby City this year, the nine was on the spot, but the break box was much wider. The result was that the elite players, accustomed to the more challenging Matchroom break box, had a pretty easy time of it.
It's the combination of the need for the cut break with the narrow break box that has made things the way they are at the Matchroom majors.
You've suggested that the test is too stiff and, for all but the superelite, conservative play has too often been the result. I agree.