The various allowances are certainly helpful but £1,000 doesn’t really factor in when you’re dealing with rental income. Almost every landlord will cross that threshold and should expect to fill a return in.

Hearing about how taxes work in other countries makes me grateful for the system we have here.

Most people never have to file a return. The people that do have a more complicated arrangement and probably need to summarise expenses, etc.

Sure for any actual landlords, but at that point you're running a business and that's pretty different from 'normal' income.

The allowances are more so ordinary people taking in a lodger don't get caught up in tax requirements.

You could probably choose to pay yourself a PAYE salary from a limited company and not need to complete a personal tax return.