To each their own. My eyes turn 60 a little later this year, and while my reformed diet of a few years now (almost nothing but meat, after almost 39 years of no meat) has done wonders for my eyesight and a number of other elements of my health (skin elasticity most proveably - I almost don't get scratches any more, even play fighting with the cat), a red dot such as my 3MOA FastFire III still flares out a bit. My Holosun gold dot sight should have a 2MOA round dot, but for my right eye it's more like a 4 or 5 MOA oval. Which is fine for plinking with my GSG-16, but not something I'd want to aim with for anything important.
So on my PCC, the TNW ASR in 9mm, I opted for a scope. 2-7x Burris Rimfire at first. But I found the 7x level unsatisfying when putting groups on paper at 100 yards, so found a 2-10x 30mm FFP Visionking scope which seems about perfect for me. Excellent clarity with no distortion, wonderful reticle which zooms along with magnification. Very bright. Easy to quickly acquire closer targets at 2x. For older, less perfect vision, such a scope works very satisfyingly on a PCC, without being very heavy - about 17oz added to the 5.5lbs carbine.
But of course if a dot sight works for whoever, that's great. Wish it worked for me. I like both my dot sights, just don't have them mounted on anything I'd call 'serious' - the Burris FastFire lives on a side-lever air rifle intended as a backup squirrel gun, shooting at around 10fpe and with decent enough accuracy for 1 shot kills out to maybe 15 yards. Suits that job just fine. And if I were thinking of my 9mm as something like that, if for something like knocking down competition plates during a speed run, then sure, I'd put a dot sight on it. But I like that it's really quite accurate at 100, so may as well have an optic mounted with which I can use it to that range or a bit further.