Pretty much every expensive medication has a copay assistance program in the US.

For trirzepatide: https://www.mounjaro.com/hcp/savings-resources

They typically are income blind and make your out-of-pocket price negligible. I'm on a med (Skyrizi) that's $18k per shot, one every three months; their assistance program ensures I don't pay more than $5.

They chip in on the deductible/coinsurance/copay, you don't skip the medication due to cost, and they still get significant money out of your insurer. Everybody wins, until everyone's premiums go up next year.