Ah, see this is where it all collapses.
A vote, such as a general election is a snapshot in time - and the result of that is INSTANTANEOUS. The winning Labour party instantly kickstarts the process of putting Corbyn on the throne. Brexit by clear and obvious contrast is NOT an instant action and instead will have taken at least three years once all the fcukwittery is dealt with.
We cannot go back in time, but we can reset things today and say "right, here's the deal, here's no deal, here's remain - pick one, the result happens tomorrow".
And as for the elderly, the only old people this result actually affects either way are ex-pats and I'd bet an awful lot of money which way they would have voted. Bear in mind the only thing the elderly benefit from is the NHS, when you've got the Clown Prince of Buffoonery with his foppish, racist charm harping on about saving £350m, what you gonna do? You're sure as **** not finding many octogenarians on YouGov forums sanity checking the facts. Most would think Reddit is a noise a frog makes.