That really has been the attitude over the past number of years and the exact reason why small landlords are running like greyhounds.There's been very good arguments been put forward by many members on this site in relation to how other assets (equities) should be treated from a tax perspective (dividends and potential gains).... Why should rentals be treated any different from equities? As far as I can see no landlord is in it for altruistic reasons! They are in for pure profit with the tenant paying their mortgage while the landlord pockets the gains...
Plus the fact you can have decent tenants for years and some cowboy decides not to pay the rent and stays on a freebie for the best part of 2 years. Not alone will you loose two years income. The property most likely will be left in rag order. Also your previous good tenants paying rent in full and on time counts for nothing when you average out rental income over several tear time frame.