Why are these older engineers not training themselves already, and who should be training them? If people in one of the highest demand and best paid professions

Why are these older engineers not training themselves already, and who should be training them? If people in one of the highest demand and best paid professions out there cannot take some time to keep their skills up to date, why does it fall to some nebulous "we" to apply re-training to them? If there's some geopolitical reason that it's a good idea for the government or someone to offer them free training programs, I'm all for it, but I'm not understanding the moral argument.