You’re correct in that well played safeties ARE an aspect of 9 ball, in MODERATION. The 3 foul rule seldom comes into play so it’s really a non factor.
Sadly with the “changes” that have been implemented, I.E. racking 9 on the spot, break boxes, and 4” pockets, games have more safety play, far more than what was common in the past, if not for any other factor than players deciding a safety is a higher percentage play than taking on certain shots, with the mitigating factor of that decision being based on pocket size reduction lowering the percentage of pocketing the ball, or more often, being able to cheat the pocket and still pocket the ball and get shape, which WAS a big part of 9 ball. It has changed the style of play, and has made the game into something it wasn’t intended to be.
What I don’t get is the references in threads like this, that “it is boring” to watch players break and string racks in packages, which IS generally the justification given for changing the racking of the balls, 4” pockets and “break box” rules currently used in today’s game. I don’t find it boring to watch players demonstrate their well honed skills in this manner, as that is the goal isn’t it? I never heard players or fans bitch about it until Europeans became more prevalent as both players and fans.
I’ve said it before and I’ll say it again, if the “powers that be” that run the pro game don’t like 9 ball as it is intended to be played, then perhaps they should select a different game to feature, instead of tinkering with the rules and equipment to make it something it is not, nor intended to be. If 9 ball is too easy, then go to 15 ball “61 rotation” instead, just leave the damn game alone.