It is missing the nuances of this situation. He wanted to be PM, up to a few days before the referendum was announced he was looking like a supporter for remain. But he saw the opening to make himself more relevant so pitched up to the leave camp. What he doesn't want to do now is upset half of the electorate when he has a very small majority anyhow. If he did go for a No Deal then he would likely be booted out next election, as even if it's moderately successful there still we be some pain and teething problems.
So if he plays I'm going to leave with no deal, he can get parliament to block it. Now he is not on the hit list of all the leavers as what could he do more, he wanted to leave with a no deal, so they can turn on Corbyn/Liberal/SNP instead. He will still be onside with tory eurosceptics because again what could he do more, so he unifies the party behind him. The Tory voter remainers will then not have to vote for someone else in protest and all that means is he has the best chance of winning a majority that will keep him in power.