And more importantly there is no good alternative.
look at the front runners:
Sunak
Truss
Gove
Javid
Are working class brexit types going to take to any of this lot? Johnson's clown act papers over the fact he is an incompetent posh boy who doesnt care about anything beyond himself. None of these can play that trick. Sunak is currently on a working trip to California where he happens to own a beach front property. One of 10+ properties he owns. Truss is thick as mince and used to be a remainer. Gove is a wierdo. Javid is miserable. Back bench tories are looking at this and thinking how bad May did against Corbyn. Labour are in far better shape now than when May rolled the dice. The tories without Brexit and a clown to front it are in real trouble.
They all might want the job but if you are a Tory MP that won your seat on the back of the brexit vote and having lost a lot of the middle class white collar support do you you think your chances of keeping your cushy job improve with any of this lot.