I’d be sad if Apple stopped selling their chargers, primarily because with their engineering I’m pretty sure I get a safe well engineered product, whereas 3rd parties can display both lower quality and some really concerning cost cutting measures.
http://www.righto.com/2016/03/counterfeit-macbook-charger-te...
http://www.righto.com/2014/05/a-look-inside-ipad-chargers-pr...
Sure one could then find reputable vendors, the Apple ecosystem has quite a few but most people would more than likely get the cheapest one from Amazon and sadly some of those products carry some serious safety risks.
I like that Apple has their own offering which one can feel confident in using. It is also nice to see that they will walk away from a design such as AirPower if they realize they cannot ship it to the standard which should be required for power delivery. At it’s base such a product should at least be easy to use and safe.