It can be done but it has to be done at least a year before they enter a nursing home and go on Medicare.
I have no problem with that if they follow the laws and regulations about it. It’s called estate planning.
I do have a problem with people who don’t plan and then when trouble comes try to skirt their responsibilities by foisting off the full cost of caring for their parent to the other tax paying citizens.
BTW, my recollection was that the actions had to be 2 years before that, but no biggie.