Some friends are theoretically open to committed partners, but only if they can be long-distance for the first few years while completing their adventures around the world. There's a big push against compromising even your travel agenda, let alone your career, to be with someone.
I have a hard time with the idea that there is anything moral or immoral about work or leisure. In 50 years time, it's very unlikely anything 'work' I have done will matter.
Leisure activities are only immoral if they hurt yourself or others. If your activities lead you to become an overweight shut-in in poor health with few friends, sure. You could make the argument they are immoral.
I think you can be a retired dabbler and dilettante and absolutely live a 'good life'. At the end of the day, all that matters is that we live lives true to ourselves and our relationships with others. All of our accomplishments are dust in the wind, and will be forgotten.
Do not assume that everyone has the freedom to make such decisions. Moral decisions are ones that you can make regardless of life circumstance. Many people simply cannot afford the traditional lifestyle of getting married and having kids. I don't mean incels, I mean that all over the world there are young people who want to marry and have kids but are locked into economic situations that preclude the ability to take that "moral" path.
The modern selfish senior would rather live 5 more years in a nursing home with a bad quality of life than give their inheritance to their children. The inheritance is instead given to the state and megacorps.
Many of our parents inherited a home.
Poverty isn't what I meant. There are people, sometimes rather well off people, who are nevertheless in economic situations that preclude marriage. For instance, some people have elderly or disabled family members which they must take care of. There is huge gap, the entire middle class, between "poverty" and not having enough money to hire 24/7 care. Others have good well-paid jobs, but jobs that mean they are located in places with male/female ratio that makes finding a partner next to impossible (China's "bachelor" villages). Still others are limited by cultural norms that do not accept marriage of persons without traditional full-time employment regardless of wealth (India, Japan). Just look at the difficulties surrounding Japan's princess. The real issue there isn't that her husband is poor, he really isn't, but that he doesn't have a traditional fulltime job.