Why is it ridiculous to allow for tax-excluded display of pricing? You couldn't run a TV or newspaper ad with tax-included pricing in the US since there are so

Why is it ridiculous to allow for tax-excluded display of pricing? You couldn't run a TV or newspaper ad with tax-included pricing in the US since there are so many different taxing jurisdictions here (more than 13,000, as of early 2023). Perhaps what's ridiculous is that we have so many different taxing jurisdictions.