I would say 95% of the voicemail is spam. The other 5% also sends me an email if they couldn't reach me.

So basically the only reason I check my voicemail is to get rid of the notification on my phone

It's funny how you remain completely unaware of the merits of your country's set of laws unless you hear from how things are elsewhere. We do have spam calls, but they are rare enough that people bonding over spam call infuriation might reference one that happened a year earlier.

yeah it's a total shitshow in the United States; I get 20-25 spam calls a week unless I shell out for a service to block them (TrapCall, Robocaller, etc.)

I'm sure there are bills in the works, but those same bills are likely bundled along with completely unrelated nonsense.

Use something like Google Voice that gives you a transcript. In fact, I bet Google could probably automatically flag spam voicemails if they tried.

Of course, you may not be comfortable with giving Google access to this data...

I have transcripts, but I still have to read them. You're right though, it's better than listening to the audio.