That's such a irrelevant/misleading statistic. People aren't griping the incorporation vs soul proprietorship of landlords. More than half of those individual landlords own multiple rental properties. Thousands of them own enough rental properties (4+ in Canada) to require a property management license, that many do not possess.

Individual landlords are the ones buying up detached homes, hoarding them as extortionate rentals until selling them as land assemblies so that corporations can build overpriced breadboxes.

If you live somewhere without strong tenancy laws than corporations basically get a free pass on colluding to drive up local rental pricing. End of the day they own the apartments around universities and hospitals where demand will meet any price.