The article literally "it’s 'racist' to ask a person to repeat what he said because you don’t understand". I'm not sure what part the OP is misunderstanding.
Pretending you understand can be a problem (aka "but I don't want to wear a puffy shirt")
Usually I am accompanying someone that can understand so I just slightly nod, give an occasional neutral' hmm-mm' and look to my friend for tells. After a few moments, I request the location of the bathroom and escape.
I do it all the time, although I usually put in a pro forma apology. I have a lot of phone conversations with people who I don't know where they're emotional and talking rapidly in a heavy foreign accent. I say "Sorry, I can't understand you. You have an accent. Can you repeat what you just said and speak more slowly."
What else am I going to do? Pretend I understand when it's important for me to get details to give a legal opinion?
The folks who developed the language envisioned the it would become internationally used, much like English. However, Esperanto would be developed from the ground up, without the weight of history.
It's an idiotic assertion; what else can be said? As an aside, and someone who knows about accents- a thing or two since I have one when I use English, I have to say that understanding accented speech(for those with an average hearing) must be somehow connected to intelligence. I have noticed, every single time, that "sharp" individuals have no trouble with my accent, whatsoever. The individuals that are a bit slower, on the other hand, well, I'd rather send them a text. It's a pretty convenient way for me to sift and catalogue people I meet. It has happened a couple times that I have actually left a professional lady after the customary pre fuck chat because of her inability to follow my speech pattern. I have also cut appointments short for the same reason as an encounter with limited communication is a mood killer for me and 100% no repeat.