Love how nobody checks what Zoom actually does in terms of audio.

First, the do a lot around synchronizing video and audio. On bad connections they slow and speed up video and audio to keep the appearance of coherence. Really, really hard stuff that other video conf systems fail at.

Also, they have audio settings to filter background noise. Basic settings around the mic, but the Advanced settings about noise cancellation ("Original Audio").

If you book online classes for music teachers, you'll see why they prefer Zoom and which settings they recommend.