When such hardships are made optional by technological or social progress, most find new challenges to conquer but many regret their loss.
Birth control is old news in the Western world. But the cycle will repeat with new technologies. Suppose you're serious about fitness, you spend hours every week spinning and cross-fitting, and your abs are rippling. And tomorrow, a pill is developed that lets everyone be perfectly fit with zero effort. What do you get for all your hours at the gym? Can you imagine being bummed that everyone else is getting for free what you worked so hard for? That might give some idea what pre-birth-control nostalgia is like.
And it used to be that, in order to eat food, you had to work 12 hours a day under the hot sun, which was great because only the righteous could be fed.
Now anyone, even those born to a weakling family, can get a job as a software developer and spend time chatting on Hacker News, and still feed a family. It's shameful.
For a clear-eyed view of these less inspiring aspects of human nature, read Sapiens and Homo Deus by Harari.
"Socialism never took root in America because the poor see themselves not as an exploited proletariat but as temporarily embarrassed millionaires."