If its with a competent aeros instructor then yep it will be useful. Not many of them about. Just a load of FI's that have spun a C152. And then there is getting a decent machine to do it in which is on a schools books.
Will it decrease accidents?
Well the statics say no. You actually increase the number of training accidents.
Its not me you need to argue with its the statistics boffins. Which is why I doudt it will ever be back in.