I wish. Compared to 10 or 20 years ago developers have a lot less say in these things.
10 years ago I would be able to block some megalomaniac plan from an UI/UX designer outright.
Today it is borderline impossible, as designers tend to have 10x more power than before and don't really care about feedback from developers. Everything is done on a "Parallel Track" sprint, also known as "Waterfall", since designers can't really do Agile. So development teams get a bundle of tasks that's a black box until you open up and there's all kinds of custom shit copied from products from trillion-dollar companies, done by teams of hundreds or thousands.
Honestly having to work like this makes me consider leaving this industry.
...followed by a 1 hour debate on slack and a series of meetings with an ever increasing number of non-technical managers before a likely unsuccessful outcome.
Arguably worth trying anyway, but let's say I want to say "No" to 3 of these new misfeatures per week. Do I still have time to do any work? Probably not. So I'll pick my battles.
Product Owner: "Let's remove the Save button and instead simply save every time the user changes the value".
Developer: "No".