I'm pretty sure commodity fetishism was about treating commodities as fetishes (in the older religious sense), that is, objects that appear out of thin air, by miracle or as the result of rituals.

Effectively, commodity fetishism is the psychological tendency amongst liberals to erase the origination of commodities and treat their creation as something of a magical or spiritual or cultural process.

I think it is easy to see the commodity fetishism inherent in the countless bourgeois news outlets which ignore the actual material production or historical development process when talking about anything in economics.

As for the "firepower fetishism" you have described, the term makes sense for how we use the word "fetish" today, but it could theoretically become a bit confusing. Although I believe this is more the fault of the broader marxist tradition which has been resistant to updating its terminology