Correct. Praying like gambling or eating or drugs or most any THING is not the addiction. When how you perform or use the THING interferes with normal behavior, with other people, with family, with work, with your health then that behavior can be the issue or addiction.
I'm not really sure that this captures the essence of what we mean when we talk about addiction. It strikes me that an intelligent person can manage many kinds of addiction such that it does not noticeably interfere with their daily lives; whilst still being addicted.
The idea of adding in 'health' seems even less connected to what we're actually talking about when we say 'addict'. Many people engage in behaviours damaging to their health that we wouldn't consider addicted to anything. Many I'm missing your point. but it seems like you're equating 'addiction' with 'harmful consequence', but that's not what the word means.