Ice cream parlors, not "coffee shops" or "massage parlors" are currently the most hotly debated topic in Amsterdam's tourist area...
Why would anyone (other than other desert sellers) care how many ice cream shops there are, except to complain that there isn't one? I love the Dutch, but they are about as foreign to me as the Japanese, even more when it comes to anything food related.
We have the same argument locally about betting shops and cafés.
It is a known business strategy in these industries to open additional stores to dilute the success of competing stores. This creates an artificially high number of stores, wasting public space and limited resources: potentially reducing the economic health of a whole area.