Well it is a good indicator of what stuff people do not like to spend time on. Turns out it's making decks, reports and all that. I use AI for building games and a virtual LAN party OS and everything is super polished and looks great (to me), because I spend a ton of time on it and obsess over details, AI is a big accelerator in that venture for me and gives me superpowers.
But yeah sometimes when I just need to deliver some asset to a customer I use AI to create it and lightly edit it, the result is ok but it's not great.
I share the disdain for AI built presentations, especially Claude has a signature look that is so tiring. I remember this phase when Office 2016 (?) came out and featured this "smart" diagram editor that let you create these cringe arrows, flowcharts etc. with bullet points, some people really got hooked on that and used it everywhere, the result was as cringeworthy as the AI presentations are. Eventually people lost interest and things got back to normal. AI might be different though.
That said I also generate presentation decks for my products with Claude using an HTML based workflow with proper print CSS using Weasyprint, where I use my own corporate identity and design practices from the web, the result looks really professional and pleasing (to me), customers also like it a lot. It doesn't really look like AI either as it's just good HTML and CSS with a print stylesheet. So there are ways of using it to make things better, but it also brings out the lazy side of people that don't care so much.