Because if you haven't heard anything else, then you don;t know better.
AE doesn't even come close to Aktimates which cost just a bit more. AE are stomped by Hivi Swan speakers which cost half as much, and I am not even exaggerating but Swan are overperformers for their price while AE is a bit over rated. And I have owned multiple speakers from these brands, at least 1+ speaker from each brand.
There are lots of other lesser known speakers which are better than AE for the same price. AE isn't the worst out there, but for its price you can often do much better.
And I have owned:
AE5 for a few years
And also heard:
And read extensively about:
Swan M1080MK IV
And AE5 is a tad lower than the cheapest Swan bookshelf which costs around $200 in USA.