It depends what you mean by worse off. Maybe in terms of short term cash flow a landlord could be worse off, but in general in terms of overall wealth and assets they will still be much better off.
I would also say the main risk of landlords losing money is negative equity when the property market crashes. Property market crashes are also a symptom of artificial price inflation via too much credit extension in mortgage loans (which in recent times has been saved by currency issuance via money printing). The market gets pumped too much by a greedy banking sector, which in turn can lead to a property crash which is very damaging for the small time landlords.
I don't have a problem with the role of landlord, many of whom do a valuable job in terms of their property transformation / upkeep skills, more with the runaway banking sector. I think the banks are to blame, but they have captured government, and the problem is poorly understood by most British people because they don't take enough interest in finance. Hence we have the boom and bust cycles of today. Personally I advocate for paper currency issuance to be taken out of the hands of the private banking sector, and feel this would solve many of the problems with the UK economy and the housing market, and allow a much more prosperous capitalist economy. The best solution I have seen for this is Bitcoin. However, those in power will not want to give up the immense power that comes with the ability to issue currency.
If the LL owns the house for 20yrs. Something has to pay all the costs and risks to get to that point.