smiddy,
What young child could possibly hold their own with a discussion in theology or even comprehend the complexities of Christianity with their counterparts.?
It is something of a joke, isn't it!
Cathloic priests have to have at least a bachelor's degree, preferably in fields such as religious studies or philosophy, before they can even be considered for seminary training. They then have to graduate from a seminary, where academic work includes such subjects as biblical theology and philosophy.
Contrast that with the case of the JWs, where - as you have correctly observed - even a baptised 10 year old child is classed as a minister.
How many JWs would these days be willing to cross swords with a priest / pastor / minister of any of the mainstream churches, I wonder? My guess is that most would be looking for the very first excuse to disengage from the enemy, and then to flee the field!
Bill.