I see your point, but... I don't know. Nowadays, attention is a prime commodity. The easier something is to consume, the more people it will reach. And while that doesn't matter as much in entertainment media, it has to be considered when designing for more important topics. Thus, media has to be designed to be read efficiently.
I don't love how media is designed nowadays, precisely because it is monotonous and boring often, but I don't long for the days when I had to look an entire page over for the bit of information I'm after. A balance can be struck through clear layout design and following trends that respect hierarchy. Maximalism does neither.
Though, I feel like I have to differentiate artistic media from informative media. Art can go bonkers, in fact art should challenge established tropes, but design should prioritize function over form, keeping in mind there is some room for aesthetics in there.
Again, I'm approaching this from an efficiency and ease of use point of view.
That's about it. Clients often have an idea of what they want, inspired by stuff they've seen already. It's just safer to request stuff that already works than innovate. So designers might have more interesting and readable ideas but they end up doing what the client wants anyway. Good way to see this is designer's online portfolios.
A good client provides some guidance but offers a fair amount of freedom in regards to exploration, the average client has an idea of what they want already, and the worst kind of client tells you what they want from the go (because most often it just won't work).