I did it as a holiday job whilst at uni - but it's not fair to blame the people working there because their boss has a sharp business practice.
I worked really hard. We had 4,000 tenants on the books, so that's a constant round of: viewings on vacant properties (matching the person to the property is important), drafting legal documentation, setting everything up on the system, dealing with admin and repair queries, responding to landlord queries, pitching for landlord business, pitching for block management business, arranging regular maintenance as well as urgent repairs, dealing with a rent roll for a huge number of payments every month, balancing a cash till, drafting and issuing court proceedings, attending court hearings for possession orders, enforcing court orders and money judgments, applying for attachment of earnings orders, cautions (not available any more) and charges over properties, carrying out detailed inventories and dealing with deposit refunds, writing adverts and articles for local papers, dealing with insurance claims and neighbour disputes for the block managements, running the website and updating it with fresh particulars every time something let or became available...
I'm not going to say it's rocket science, and actually lots of it is good fun, you get to see and speak to a lot of people and there was a great atmosphere in our office. but how is all that not "a proper job"? it pays badly and you get very little thanks from some people. it's unfair to say that it's only for thick lazy people who couldn't be bothered to do something else!