For me the Best Pros is "That one random-internet-comment is a good usability improvement, ask LLM to do the small change and commit immediately."
Smaller ideas need not be approved, or held back by schedule pressure from bean counters. Just Do It. :). It's the small corrections which end up polishing the product as good as "professional usability studies".
Yeah, the small bits of sand in the gears is something that is hard to sell when you allocating engineering effort. But it adds up over time.
It makes the difference between a tool that is a pleasure to use and one that causes dread.