The reason is that they've completely fixed Bluetooth. They just work. My Bluetooth mouse sometimes fails to connect. The Bluetooth in my old car was always flaky. The Bluetooth in my non-Apple headphones sometimes connects and sometimes refuses. I don't own a Bluetooth device that works like the Airpods do.
The Airpods always just work.
They've completely integrated it. You open the case and you see that they've connected with a nice image right on screen. You want to switch them from your phone to your iPad? You select them on the iPad and they just connect. Every single time. Without exception.
No other Bluetooth device even enters into the conversation for me until they just work like the Airpods do. Nothing outweighs that for me. Sound quality doesn't. Shape or comfort in-ear doesn't outweigh it. The price of entry is that you have to make the Bluetooth just work.
The reason Apple gets the kind of praise that you seem to despise is that they figure out how to make things just work. And for a certain type of customer, that outweighs literally any other concern. You can respond all day about this spec or that spec or this or that performance test or "objective sound quality data."
But it has to just work.