There is something else regarding the til we meet again bit....
I'm presuming your children, if toddlers, also had a goodbye contact with some significant SW thing in the days afterwards...like making pictures, or releasing balloons to say goodbye, because essentially they are told they are saying goodbye forever. Is that a lie? Well of course it is (for some) but it's done because psychology research (and quite frankly common sense) tells us that children of that age cannot cope with until your X age when they are toddlers, regardless of their emotional intelligence (can anyones toddler really get time either?) so this is what they're told so that later, when they are old enough, you can approach this then. The fact that SS don't want to address this being in the letter as a concern, goes against the work they do with them prior to placement!?!?
When they are old enough to 'get it' it's still not right to have that in a letter. The pressure on a teenager is unfair. We are working towards the day they get to make a decision whether to meet BPs or not and words like that suggest the decision is not theirs. And no, we don't need to deal with the 'truth of it' because the decision is theirs, and if it's a yes the decision of when is too, that is the truth! So all you've got is added pressure (and as I've been in a similar situation with my absent father, I know that actually meant contact happened years after turning 18 because it bred resentment of putting me in that position).
I do not and will not for some time read out letters to our, at present, toddlers. However, I regularly talk about their BPs with them, (positively, the realistics when needed, talk about their sadness at their loss and we put feelings to named emotions), I also use their life story books with them, all increasing their 'emotional intelligence' in the process. I know most adopters do this, for anyone to suggest this is not being done as a matter of course is an insult. I use the letters to back up our conversations by drip feeding information. ONLY you as the parent can decide what is and is not appropriate to share based on the individual needs of your child. SS should be deciding what is and is not aporopriate to be in the letter in the first place, or atleast that's what they tell us they are responsible for during our training. Many of our children have had an horrific start and have witnessed or been party to things that may have made them more resilient, but at the same time more fragile. This is a lifetime of work we need to do with our children and for nearly all we can quote 'Rome was not built in a day' or it's a 'marathon not a sprint'.
If you're an adoptive parent who is just not talking about any of it, not dealing with it, or ignoring that your child may be missing BPs or be upset, firstly, I'd be very surprised you made it through training and secondly, I suggest you read through the thread for adult adoptees, who it seems were mainly adopted in the 70's, where information wasn't shared and adoptions were hidden....you'll change your mind.
As for SS, it concerns me that they don't check letters after 2 years and their attitude in their communication to you stinks. We've worked with amazing social workers, are they perfect? No, they're too overworked to be so, but I have no reason to complain. However, maybe recruitment in post adoption services, training, and clearly money needs to be looked at. This 'marathon not a sprint' approach needs to be SS's/the governments too and contact letters are a big part of that.