The way I would put it as someone who works at Beeper is: only use messaging automations for personal use, and don't use it to spam anyone or do anything you wouldn't do yourself within the app.
As long as you don't abuse and keep your usage within the parameters of any human, you'll be fine.
whatsmeow is built and maintained by Beeper's bridge architect, Tulir Asokan, and is used by many Beeper users every day with no issues. It's at the core of our WhatsApp bridge: https://github.com/mautrix/whatsapp
Baileys is also a great library with a big community and one of the primary maintainers of that is also helping us with the bridge/whatsmeow. WhatsApp integration in our old app, Texts, was built with it: https://github.com/textshq/platform-whatsapp
I would recommend whatsmeow over Baileys just because we are actively involved and incentivized to keep that working perfectly, and have a lot of data points to detect any issues with it at scale.
I also have a similar experience, I hate the unpair-pair dance and just use my AirPods even though Sony has a better sound quality and a bit better ANC.
The new version (WH1000MX4, terrible naming scheme) supposedly have multi device support but I haven't experienced it yet so not sure if it's as smooth as the AirPods.
Not OP but I also have a timer for certain social media apps, including Facebook.
For me, the timer is just there to remind me X minutes have passed. Losing track of time while doing something, anything feels natural to me. It happens in real life when I stumble upon a friend on the street and we start chatting and it happens in social media when I scroll too much.
If I'm reading something and my time is up, I just extend that and able to close the app afterward.