Every supply house and manufacturer that ships their products to end users outside their state or works outside their state has dealt with paying taxes to sales they make in those other states and has done so with normal accounting systems for generations.
A retail store with one location and over the counter sales is the exception rather than the rule.
And yet the retail store is the very example the pols use to explain why this must be done...
I cannot confirm or deny the supply house/manufacturer info you posted from my own experience. I was under the impression that the sales taxes enforced at that level would be those of the seller, not the buyer.
I’ve never worked at that end of the sales continuum.
Suppliers (wholesalers) and manufacturers do not collect sales taxes. They only sell to holders of resale certificates.
Sales taxes apply only to retail sales.