Slinky, as someone withing the 'system' (an NHS SALT, although happily one from a place where the PCT and LEA work very hard and effectively together and where ABA based education and SALT are freely available) I acknowledge what you say.
It's rather odd. I think part of it is down to a rather pompous assumption that what is on offer is what is best. Parents who reject it are seen as 'difficult' and unrealistic. In many cases, parents are unrealistic about what is on offer and how effective a patchy eclectic (aka 'bloody shambles') multi disciplinary service can be. It's public sector stuff, not flashy private input.
Additionally, most public sector workers in this field have their noses to the grindstone, trying desperately to wade through hundreds of children, all with hugely differing communication needs and all with parents, some of whom are more engaged than others. That's before you factor in all the other people you need to deal with-the 1:1 assistants, the teachers, the social workers, the OTs, the physios. Honestly, if you could see my caseload and what it is I am meant to do in an academic year, you would be amazed and question whether any of it can be done properly.
So, there is no timer, energy or inclination to find out about more up to date effective practiices, and even if you were willing, the NHS hasn't got the money to spend on training of any significance for most people.
I have an MSC in ABA. Paid for by ME and studied for in the evenings and weekends and holidays.Ii hadf no more than a handful of days off in the 3 years it took me, to attend lectures. If b I read an academic paper or a book or attend a conference, it's ME who pays for it.
Without flattering myself, most people don't have that level of energy, comitment or discipline.
In many ways, all i have done is make my job harder as I know know that so much of what SALTs offer is ineffective and pointless, partic. to children with salt. It's not their fault. They genuinely don;t know another way of thinking.
A real commitment to ABA based education and salt requires seismic systemic change. Not more money or staff really as there are more than enough people 'working' in special educational settings (devoting hours to lolling about in bloody 'sensory' rooms or messing about with sand.) They need to be put to work, real work and to see what is really possible.