Only one of many misconceptions
Other misconceptions about old people include
1. "they deserve special treatment because they fought in the war"
even though most people over 60 were born after WW2 and are more likely to have have been spliffing up to the Byrds than saving anyone from anything
2. "they're so poor"
even though the state pension is the only benefit that continually rises above the rate of inflation and there are endless free handouts - winter heating allowance, for example - which are not means-tested. You just have to over 60 (for women) or 65 (for men). Multimillionaires collect their winter fuel allowance because as far as they're concerned, fuck the taxpayer.
3. "we need to take care of them". One of the consequences of the Baby Boom is that pensioners now outnumber taxpayers of below pension age. And pensioners vote in far higher proportion. When you think about it, this makes sense - political parties court them with more and more benefits at everyone else's expense so they actually have something to vote for. The rest of us don't unless we happen to be lobbyists or bankers.
Seriously, "bad at IT" is the very least of the misconceptions about pensioners that we need to start rejecting.