No real opinion about it, tbh.
It’s a “price” handed out by a for-profit conglomerate, so it’s not really something I ever thought about in all the years it very briefly came up. In fact this is the first I’m reminded about it existing in 4 years or so? I doubt most germans have ever heard of the “Börsenverein”, nevermind it’s “price” or this author or what she wrote.
Relax, it’s just JSON. If you wanted to not be stringly-typed, you’d have not used JSON.
(though to be fair, I hate it when people do bullshit types, but they got a point in that you ought to not use JSON in the first place if it matters)