That information given is not totally correct or not explained well.
Chronic disease did go up across the board because of the Covid Pandemic and RFK is not likely to be able to help, especially since he doesn't believe in vaccines. Here are more real numbers
While the risk of chronic disease is not growing among older adults, the incidence among older adults is, and this growth is not just occurring in this demographic. A recent study comparing the prevalence of 17 chronic diseases among various age groups between 2005 and 2014 found increases in nearly every disease, including in the youngest groups in the study: 35-50 years old and 51-65 years old.
[14] Children have similarly suffered from increasing rates of chronic disease. Less than 2 percent of children in 1960 had a health condition severe enough to interfere with activities of daily life; 50 years later, more than 8 percent of children had such a condition.
[15] Much of the increase is associated with greater prevalence of four types of conditions: asthma, obesity, mental health conditions, and neurodevelopmental disorders (which affect brain developmental and may result in neuropsychiatric problems or impaired motor function, learning, or communication skills).
[16] In the last three decades, the prevalence of obesity has more than doubled in children and tripled in adolescents, reaching nearly 19 percent overall as of 2016.
[17] Between 2001 and 2009, the prevalence of juvenile diabetes increased 23 percent.
[18] In 2012, University of Michigan estimated that between 15 to 18 percent of children had at least one chronic condition