I agree. But a parliamentary system like Canada or UK is not inherently tyrannical.
In Canada and the U.K. they have the retained the right of secession. In this way their central Parliament are held in some level of basic check against too much oppression against a regional minority.
After all if A prime-minster like Obama tried to implement all his policy’s which oppressing political & economic interest of rural and southern States, then the same states may just withdraw their consent to be governed.(secede)
In that way politicians like Obama are forced to govern in ways more agreeable to all regions at least.