Very true. However, even with a deal with the DUP, the Tories would have to be unbelievably disciplined to be able to govern. Especially with the Scottish Tories set to have their own agenda on Europe (Ruth Davison is riding the wave at the moment, but that won't last).
Personally, I think there will be another election by October. The Tories won't let May fight another election for them. Her campaign was terrible. Negative campaigning doesn't work. They should have learned that one after the referendum.