If you what you say is true then the way to achieve getting there is to maximise the potential and make it as less 'technical' as possible so any person with any skill set can have their own private option to offer Bitcoin as a method of payment at checkout.

With already available plugins for Woocommerce and other carts that merchants use by paying a percentage of transactions fees for their service, they simplify things for the e-shop owners. With "btcpayserver" is removes the need to pay a percentage of your profits or transaction in fees to crypto payment processor companies but you need a small amount 'technical' know how to install btcpayserver and be prepared to pay for the hosting of that server as it will sync the whole Bitcoin blockchain.

The more simple the BTC payment processing process becomes the more merchants will leave traditional crypto payment providers such as those I listed in the OP.