Back then just day-to-day life was difficult. People had to put energy into just staying alive. We don't do a lot of that anymore, especially teenagers.
That goes to say experiencing new things really is a luxury, does it not?
I actually think there's room to argue that it isn't really a luxury, either. I think some of the other types would become extremely depressed living... say, the life of a peasant in the dark ages. Holidays, festivals, fairs, etc... these were the lifeline of novelty that kept these people going.
Most of the INTPs on this forum, however, might be able to handle it better. Of course, the mental starvation and having no new knowledge available would be just as bad... So, in a sense, that really is a luxury, too...
A necessary luxury? Its absence won't cause your demise with the speed that food and water can... but would it eventually end your life, all the same?
In the long run, though... I think even the most repetitive INTP grows sick without new people, places, activities, and the like... new thoughts and ideas cannot sustain one alone. So - I guess for me, the question is how often are you willing to embrace new experiences? Because we can't make the choice to avoid them forever, even if we were given it.
That's interesting, it reminds me of how everyone my age is obsessed with travelling (new people, places and activities). Me, not so much. I've always thought, what can I do over there that I can't do over here? Life is the same wherever you go, but I guess a lot of people need the novelty.
I wouldn't discount it... looking backing on my life - I found my personal growth went from slow to exponential while I was abroad and the months after it, while I was readjusting back in... Maybe not the sole cause, but an enormous part of it, no doubt...