If Bozo Johnson is elected PM. Could the selection process be deemed as non democratic.?

Considering that only 180,000 member of the Tory party will elect a new party-chairman and thereby also the UK's next PM.
Can it be right, that so few have the power to dictate, who the country's new leader should be.
Update: I would seem that some think that one can just join the Tory party,well you can't. You have to be recommended and vetted to join.It's not a workingman's-club.
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