I dont know about your countries laws, but around here, kids are not offered for adoption, if there are relatives, offering to care for them, that are capable to do so.
Legal form of guardianship is nothing but creating a word for the same thing? Yes, other cultures dont know the word "adoption" but do care for lost kids as well, by doing whatever adopting is named in their culture. O_o
Do you think, that possible troubles, adopted kids might suffer, are caused by the term "adoption" and if we just name it instead "Woozahbagoozah" or "legal form of guardianship" or call adoption parents instead "master guardianship directors" will make a difference? O_o
And I dont know what you mean with all secrecy, lies or whatever. A mother and a father is simply the person that has the actual responsibility to raise a child. So what about telling a kid, that the actual person that is responsible for raising the kid IS the actual responsible person for raising it = by law the parents, is a lie?
Do you think, that if my one is born, that I will spend the first 6 months with teaching it to call me "BIOLOGICAL mom"? I am simply the one caring for it, so I will be his mom. So if I dont give a f**k about teaching that kid from the day he can realize it, that I am as well his superimportant BIOLOGICAL mom as well, why should another mom force her kid to teach it by all means that its his LAWFUL mom.
As well that I offered my partner, that because of my Asperger, it would have been ok for me if he would have like to conceive a kid with the cell donation of another woman and me carrying the pregnancy. So should I then as well be forced to teach my kid from the first day of living, that I am not his BIOLOGICAL mum, because of me only carrying the pregnancy but not sharing the DNA and chromosomes with it? Do you think I have nothing else to do, then teaching an 9 month old kid, scientific biology knowledge of lower high school, to make it understand what I am talking about? O_o
Specially, when it wont change a thing about the basic fact, that I am in general his mum?
And what adoption brokers and agencies? Where the hell do you live that kids seem to be sold? Kasachstan? Southern Sudan? O_o
Dont blame the word adoption, if the way adoption is done at your place, is done sh***y. Instead of thinking to invent other funny names for the same process, maybe instead focus your thoughts on improving the way adoption is done in your country. (First idea that came to my mind, is caring that adoption is not about profit at all. I think that will help more then finding new fancy names as "legal form of guardianship". Calling an roomcleaner instead "Master manager of professional floor and surface hygiene and facility maintenance", will not have much impact about the given tasks.