Heaven is 100% correct.
JWs believe "spirtuality" is measured in how active you are in performing mundane JW tasks like knocking on doors, cleaning KH toilets, RBC projects, and other pointless, Sysphean exercises. I always found it odd how they admonish in their literature to "meditate" but I'd venture a bet that 98.997% of JWs are incapable of any kind of deep, meaningful thought. If they did, they'd have a hard time staying in the "Truth".
But they are quick to criticize any "worldly" person who lives a life that focuses on doing good and being a thoughtful person, simply because that person isn't attending KH lectures.
In my opinion, being spiritual and being religious are two different things. It's like if someone is smart AND funny. A person can be funny but not smart, or a person can be intelligent but not funny. They are two different qualities. But if they are together they have a chance to enhance each other.
I need a drink.