And the disadvantage that if you ask the landlord to do the repair they might just chuck you out insteadFlexibility is a massive benefit in the current environment with insecure work. There is also the benefit of the landlord being responsible for all repairs.
And hope for a tenant that's less "entitled" 
How do you think we arrived at the situation we have in this country - where MPs have stood up in Parliament and admitted that 1/3 of rental housing falls below the minimum standard for human habitation.
1/3. Don't believe me look it up
