Why is Bulpen so interested in idols?

Idols mainly target people in their teens to early 20s,
and since that population is shrinking these days, everyone is aiming for overseas markets.
Uniquely, Bulpen, which is a gathering of middle-aged men in their 40s and 50s, goes against that trend and shows an intense interest in girl groups. What could be the reason?
Is it a form of regression?