Earlier quoted context omitted.
I could understand smaller age ranges for younger folks because they’re developing at a more rapid pace. For example 30-40 age range would group together people with relatively similar life experiences, but a 10-20 age range would not.
Sure, but this is a forum for entrepreneurs and software engineers, it does not target the world demographic. To be honest, I don't understand what "they develop faster" means either. One year of age is objectively the same length whether you're 10 or 90. What has growth speed and brain development got to do with anything?
A 20yo is 100% older than a 10yo. But a 90yo is only 12.5% older than an 80yo.
The older we get, the closer in age we become.