Not really, I'm very open minded. I've presented my simple argument and no one has yet presented a counter argument to show where I could be wrong.

(BTW I don't consider "you're wrong!" to be a convincing argument)
You said it best - "
Are you imagining dollars as debt that has to "paid back", and an expanding economy as a disruption of the balance sheet between dollars created and dollars owed?". That is how I see it... is that wrong?
Right, unless the counter argument uses the definitions you use, it's not really useful.
I like the analogy of money being a measure of velocity instead of a inventory count. If there's only $1 in existence, but it get passed around between 10 people, $10 have been spent. i.e. the GDP isn't a measure of how many dollars there are, but of how many are spent.
If $110 is owed back to somewhere but only $100 are in existence, as long as the money continues to circulate the difference is accounted for.
Bob has a hammer. His neighbor John borrows it but Bob wants 2 hammers back in return(interest). John uses the hammer to build a fence for Fred, in exchange for a hammer. Fred buys Bob's hammer from him to pay John for the fence building. John gives Bob his hammer back, waits for Fred to get it back from Bob. Then gives it to Bob again, paying him the interest.