One scenario:

1. You have an iPhone, a Macbook, and AirPods.

2. You are listening to a podcast or song on your iPhone using your AirPods.

3. You press your AirPods stem to pause the podcast or song on your iPhone.

4. You press your AirPods again, expecting to continue the podcast or song on your iPhone.

5. Your AirPods are now connected to your Mac, which is opening Apple Music. This takes a long time to complete.

Note that you can not remove the Music app from MacOS without serious compromises to MacOS. It is a slow, awful resource hog that I personally never want to use, and it rubs me the wrong way. My impression of Apple is much lower for it.