I think the cultural problem we have is "announcement makes it better" rather than removing the need for the announcement at source. Sometimes this is infra-related. The tactile paving one, for instance. There's no excuse for station platforms not having tactiles in 2023, other than 'chronic underinvestment.' The ridiculous Great Western "mind the gap between the train and the platform and take care when stepping down from the train"? If we'd standardised on platform height a few decades ago and ordered stock with level boarding, that would be largely unnecessary except on severely curved platforms. "Don't take luggage onto the escalator?" Maybe if lifts weren't poorly-signed, too few in number, and at the end of long dingy passageways, people would be happy to use them more readily.What a ridiculous, risk averse and litigation obsessed culture we have. Treat people as children and they will behave as children. i am sick of these inane patronising announcements about taking care of my belongings, etc. They'll be telling people it is unsafe to leap out of train windows - oh, of course you aren't trusted to open windows these days!
A lot of them are problems of the operators' own making. Byzantine level operator or brand-specific ticket rules and complex validity restrictions create more nonsense that the operator is then obligated to explain to a general public that only really cares about getting to their destination on time and without being PF'd.
True, the excessive announcements are a problem (and there genuinely is an issue with the quality and clarity of the information—badly adjusted speakers, excessive wordiness, bad zoning, etc.) but I think they're really a symptom of a wider lack of customer focus that goes back decades.