In other shocking news, bankers don't do their own PowerPoint slides either...
There are people employed full time to do just that.
You mean associates and analysts? They at least fall under the category of "junior banker" and are on the right track to become deal closing bankers someday. Plus, the senior bankers make revision requests, so the junior bankers are like a high level programming language turning the comments. I don't think there is anything wrong with that.
Sure an analyst might slot the numbers in, maybe tweak the text. But what makes it a slick presentation is that the media assets, the layout, the overall structure, are done by a professional graphic designer who doesn't know a thing about banking per se, but knows all about creating compelling presentations. When I worked in consulting, another bit of the company did stuff like this. "Below the line" work it was called. Stuff that the client wouldn't acknowledge publicly had been done by a third party.
Again, there's nothing wrong with this. But once you know that this is how the game is played, you won't be wowed by the presentation anymore. And then you'll pay more attention to the content. And then, in supreme irony, they might as well have gone for the basic slides... But most people, most of the time, will conflate the presentation with the content.
Editing these documents for house graphic style and grammar was the very-well-paid temp job that covered my costs of being at college in London.
Lehman Brothers, Morgan Stanley, Goldman Sachs, BZW all had a 'graphics department' in the mid-90s and I worked briefly for all of them. Good job for them, too - you wouldn't believe the crap that some merchant bankers would want to give to clients.
(In fact, several of the banks had specific instructions to us about not permitting egregiously-misleading graphs get into the wild. X^2 graph axes, truncated axes designed to make a 1% price change look more significant... I remember seeing a couple of all of them every week.)
US securities laws in particular made getting in and out of the room a very complex affair. Depending on which banker's doc you were working on right now, you had to discuss things outside of the door at one end or the other of our office, but they weren't permitted to enter the room and their door passes wouldn't open our door. The little corner of Lehman's in London we were in was over ten minutes of card-waving away from the front entrance.
