I can kind of understand that some people might not excel in proper spelling (even in their own native language). Plus English does have few tricky spelling words (not to mentioned the different spelling in UK, USA or Canada just to begin with).
Plus the reading section can be rather tricky. And again not everybody is excellent type of reader.
But for speaking... even if you do not have university degree, you are rather confident when it comes to your own language. And somehow when having more simple converstation with somebody, you do not tend to speak like university professor or politician just for the sake of showing off.
IELTS General was supposed to be test for admition for high school in English speaking country. So we are talking about level of understanding and manner of speaking of 15 years old teenagers.
But ok,
I take it as a part of the immigration game. Some will go to max that one other will use other ways how to get in.