Earlier quoted context omitted.
Pro-tip: don't write the summary at all until you need it for evidence. Store the call audio at 24Kb/s Opus - that's 180KB per minute. After a year or whatever, delete the oldest audio. There, I've saved you more millions.
Imagine a follow-up call of a customer. They are referring to earlier calls and the call center agents needs to check what it was about. So they can skim/read the transcripts while talking to the customer. I guess it's really hard to listen to transcripts while you're on the phone.
But in fact, customer call centers tend not to be able to even know that you called in yesterday, three days ago and last week.
This is why email-ticketing call centers are vastly superior.