“Just call it a Belgian” or “Well add some fruit flavoring to it and now you have a Kriek.” I have heard those lines from some seemingly smart beer people. Poor things don’t realize how ignorant those statements are. There is a big difference between a Sour beer and a beer that is sour. Not to mention not all Belgian beers are sour!
Sour beers are really no different from Saccharomyces cerevisiae only beers in the thought process and recipe design. You wouldn’t haphazardly add what ever dark malts happen to fall in a Stout or just reach in the fridge for whatever hop you might grab for a lager. Same with sour beers and the bacteria that goes into making them. Most breweries have a specific blend they like to use to get the desired flavors. Again not really any different than choosing hops for an IPA. Even the great storied Lambic breweries such as Cantillon that do wild fermentations know what what the air holds.
It takes a lot of work to produce a good quality sour beer. In many cases it requires more time and energy than most other styles. Thinking years down the road to the flavors you will have requires quite a bit of knowledge and experience. While these beers are certainly wild and funky with bacteria, they are by no means beers without basis or second class. Lumping Belgian/French Ales and Belgian Strong Ales together with all Sour styles doesn’t do any of them justice.