No it isn't. <s> Of course it is easy to find a spouse that supports you, buy a house you can rent easily (wonder what will happen when the tenant leaves), have a nest egg ready so you can afford to not have a living salary. </s>
Most people, even in their 20's can't really easily afford to not have a salary unless they have the support of someone else (parents, spouse, family, etc). Making it seem like it is easy is what people are complaining about.
Actually it is easy - to know how. Its just hard to have the discipline to do it. Save 10% of what you earn for 20 years. There you go, not rocket science.
Most people, even in their 20's can't really easily afford to not have a salary unless they have the support of someone else (parents, spouse, family, etc). Making it seem like it is easy is what people are complaining about.