True. There are a lot of entitlements that younger people get that could be cut first. However, the notion that Social Security could get reduced by about 30% holds true on its current trajectory. Eventually, the IOUs will run out, and then they will have to pay less to balance things out.
Otherwise, they will use more printy-money, and that will just contribute to inflation.
Last time I checked years ago SSDI was 25% of SS payouts and the payout ages are much less than SS.