They should have done this long ago. In the build up to 1975, they praised JWs who sold property and left jobs to dedicate all of their time to preaching "in the remaining months" before the end. They warned young people that they would "never grow old" before the end. Reminding them to prepare for old age and retirement would have run counter to the message.
Then, when 1975 passed without incident, they tried to ignore it and then blamed JWs for getting too worked up over nothing. They finally made a half-hearted admission of their part in it, but only when publisher growth went negative. With the chance to remind JWs to prepare for old age and retirement, they instead leaned into "the generation" for another 20 years.
And it's taken a further 20+ years after that for them to finally decide it's a good idea to encourage JWs to prepare for old age and retirement. Too late for all of the JWs who were convinced the end was going to come before they got old. Can't collect money from them now, I guess.