You got examples in mind?
Perfect custom designs take time and work, and it's risky to invest into them without some initial idea validation.
Discussion
Yeah its not something ai will figure out by its own for a fortune 500. But for a mom and pop shop sure you can use midjourney.
I see. I'd say that fortune 500 got the growth disease, wide portfolio of products, placing innovative bets everywhere, buying out smaller competitors, but they don't focus and perfect their core craft.
It's a safe bet that any company with 10k+ employees has a mediocre UI at best.
I've always seen pressure on delivering measurable wins, not delivering delightful experiences / value.