The quality with LDAC or even AptX HD is basically indistinguishable from cable.

Sure, there's compression, but LDAC for instance is 900 kbit, and that's roughly where a FLAC is, and FLAC can do lossless at those bitrates.

Bluetooth isn't just one thing, it can encompass multiple technologies to transmit the data, with varying fidelity.

Small wireless earbuds have gotten markedly better, but they still have to cram in tiny amplifiers, batteries as well as wireless transmitters into something that can fit in your ear. Some models have a fair amount of hiss at rest because the amps are driven so damned hard, and hiss annoys the shit out of me. You won't get that with a high quality unit like the Qudelix or the FiiO BTR5 I use, and in my opinion when people start saying how shit Bluetooth is, they're confused as to where the problem lies; it's not the wireless transmission, it's the shit gear they have in their ears.

Phone amps are also often pretty shitty and low quality. I'd argue that the great amp in the 5k is more important than avoiding wireless.