I read it as "a bunch of front-end devs who have no idea what the back-end is doing."

Which, in many cases, is A-OK. If lots of developers don't ever learn to write their own SQL queries, that's not that bad. There are lots of things to learn out there, and by necessity any professional is going to have lots of stuff she doesn't know. Doctors and lawyers specialize out the wazoo.

But when it comes time to realize that you had the wrong version of SQLAlchemy installed and now strangers can pass in arbitrary SQL code via any LIMIT parameter you exposed, and you are sitting there wondering "huh? whu?", well, that's probably not the end of the world for your cat-picture site. But if you are handling money, you need to know what's going on.

For example: You can only have so much security if you don't have security experts. Same with every other area. I don't remember the details now, but their first iterations were pretty lame.

Well for one example this exchange is really poorly designed in several ways with respect to the standards and expectations set by other exchanges.

Though the benefit of the web-developer talent is that is also years (perhaps decades) ahead of them in others.