The gotcha there is that you can use multiple gateways to access you page. So you are right, you need to have a http <--> ipfs but you can have many of then and

The gotcha there is that you can use multiple gateways to access you page. So you are right, you need to have a http <--> ipfs but you can have many of then and anyone hosting an IPFS node can have a copy of your page and serve it.