Sure, it’s not unethical for a kid to accept (necessary) help to survive, though it is to vote for or otherwise institute a society where that is necessary. The point the article is attempting to make is social commentary to draw attention to the fact that increasingly the lottery of inheritance is the only means of owning a home.
The first step to resolving the issue is identifying it. Nobody likes the implication that their success is not earned, by making that uncomfortable point the author is attempting to cause people to support change to correct this trend.