Standard English and Received Pronunciation. R.P., are a way of our all understanding each other. Of course, we all speak differently to different audiences and we do not want to be snobbish or judge.
However, let us not kid ourselves that we do not really think the worse of those whose pronunciation is lazy, mistaken or plain wrong. Spoken English is a de facto social marker.
Hypocrisy is a feature of virtue signalling and non-judgementalism. We say, 'Don't judge them' in a patronising way when, really, we would not speak badly ourselves or let our children do it.
I fear it is just another deceitful way the middle classes lie to and keep the working classes 'in their place'.
I speak as a working class girl who sneaked into the middle classes by teaching. I educated my on children at prep and grammar schools and their lovely manners and accents have done them as much good as their fantastic education.
I have no wish to pull up the ladder after I used it and taught and advised my own pupils as I would have wanted my own children advised. At least I let them know that whatever they said, employers wanted S.E. and R.P.