The fact that the advisor in the OP changed their stories multiple times indicates duplicity. Your inability to see that, coupled with an abrupt allegation against the journalist suggests self-deception

You should disclaim that you're on the core team of Marko.

Coupling metrics to experimentation is a huge red flag.

You should offload that onto DBT or some other data modeling tools.

Do you mind explaining that a little more? As it's currently designed, a company could use DBT to model their raw data into dedicated metric tables and then Growth Book sits on top of those with a really simple SQL query and some settings (e.g. is the goal to increase or decrease the metric)

I'd love to see an open source standard way to define metrics, but haven't found anything yet.