It's the last refuge of the incompetent shooter.
Whenever some "Reality-based instructor" tells you that they are going to teach you what really matters about pistol shooting, and their pitch includes things like "the sights don't matter", "tight groups are for prissy bullseye shooters", and "you want your hits to be spread around, so you have a better chance of hitting something vital", what they are really doing is trying to massage your ego, which is bruised by being unable to make an A-zone hit on demand, and trying to separate you from your hard-earned dollars.
If you are bound and determined to tote a pistol with you every day, the first skill you need to master, at least from an ethical standpoint, is being able to place a bullet exactly where you meant to place it. Remember: once it leaves your gun, you are going to pay for every single thing that bullet hits. Take your time; there's no rush. Then work on more rapid fire. Then work on snap shots from the low ready and from the holster. Then, and only then, work on things like "point shooting", "hip shooting", "instinctive shooting", the "speed rock", or whatever the new terminology is.
Don't try and massage your ego by telling yourself that even though you can't hit what you're aiming at, it's because you're a "real combat pistolero".
Remember: You will pay for everthing your bullet hits. Make sure you can hit only those things you want to buy.