That is truly an absurd statement. Following your logic, 10 million companies using bitpay to accept bitcoin "does nothing positive for widespread adoption of bitcoin" -- compared to say.. 0 companies using bitpay?
This is actually amazing for widespread adoption; it teaches companies how they can use bitcoin as a secure, chargeback free, negligible fee payment system without being exposed to volatility of the underlying asset (which speculators are quite happy to do themselves).