Well, if it works for you... who can argue? If you are pleased with your cigars, can make those judgments, and never (or rarely) smoke a cigar and retrospectively determine it wasn't properly hydrated, then sound like you don't need the hygro!
For me, I prefer having them. I have a wireless I'm using in my coolerdor, and I now have a see-through fancy tupperdor as well through which I can observe my non-wireless hygrometer.
So, I can check without opening either. I like being able to glance at those to make sure no additional humidity is needed... or to address it when it is.
Saves me some stress! I think if I were attempting your method without guidance of the hygro, I'd probably screw it up...
That said, I do think we have a tendency here on CS to "overanalyze" what we're doing. I think if they're smokeable without plugging of flaking apart... that's about right.
Folks with uber-palates may disagree, but for me, I probably couldn't really tell you a taste/expericence difference between a 62% cigar and a 72% cigar, provided it wasn't plugging of flaking apart.
The only reservation I'd have there would be that, if I was keeping a cigar for several years (which I'm doing by virtue of the fact that I have hundreds), I'd feel more comfortable knowing I was relatively consistently around 70%.
If I kept about 25 cigars on hand... I'd probably be just fine using beads and not bothering with the hygro.
So, hygros for me.