The only Beatles UK single actually lifted from an LP was right at the f**-end of the decade, 'Something'/'Come Together', on the instruction of a man who knew exactly which way the wind was blowing, Allen Klein (see also Peter Grant.....these guys were MADE for the 1970s).
The Beatles themselves had, by that time, rightly and honourably jumped ship.
The first Stones' A-side (along with its B-side!) to appear on an LP was, whaddya know, the first one after the 60s!
By the end of the 1970s, two 45s were routinely taken from LPs, then three in the dire 1980s.....etc. etc.
Value for money out the window, pack all the consumers into vast stadia, sell 'em T-Shirts and baseball caps.
Hyde Park, Woodstock and Altamont had all pointed the way in 1969.
It's only a hop, skip and a jump to the farce of 'Thriller' by the....erm.....'King of Pop', again in the dire 1980s, when the plundering of singles over a full two years off said LP all but killed the pop single, the pop chart, and made shows such as 'Top of the Pops' almost completely redundant.
Thank the Lord, The Beatles were around when they were as, if The White Album had been released in 1982, they'd have released seven singles off it.....and the need to produce new music like 'Get Back', 'Ballad of John & Yoko' and 'Abbey Road' would have been unnecessary, and would probably have never existed.