I don't think that's part of their decision making, Liquid Glass moved most things around for seemingly not much else than novelty and that's not the first time.
They have done this before, release something large early in anticipation of a major shift and iron out issues before the shift happens. Liquid Glass started off a little janky but they appear to have been ironing out initial issues with each update.
That doesn't change the fact that I can hardly read some of the user interface in Apple Music for example.
It's not that the idea is bad, but it's badly executed.
Nobody asked for a phone with fake buttons and a fragile wrap around screen.
Nobody asked for the UI to drastically change at random.
I wish smartphone companies would treat their products like they were completed devices with no innovation required. They are fully mature.
Instead, work on making them actually improved in ways that matter rather than trying to find “the next big thing.”
Be more like Toyota and less like Tesla.
It was famously explained in the original iPhone unveiling. They talked about developing new paradigms in computing and jumping towards those new paradigms with both feet.
Also, Steve Jobs once argued with Woz early on that users don't have a say in the product. The author creates a piece of work and does not stop to ask the audience what the next paragraph should be. At the end either the audience likes it or they don't and they go somewhere else. All the "toyotas" of the tech world are competing to 0 margins and will eventually die off. When Apple tried this in the 90s they ended up nearly bankrupt.
Here is Steve Jobs explaining this philosophy when users asked for cheaper machines: https://www.youtube.com/watch?v=U37Ds3RvyoM
I don’t think that cavalier attitude is universal at Apple and I don’t think the Siri PM wanted to break with their past respect for UX.
Liquid Glass was Apple’s logo change moment