It sounds like he realizes there is much more to life than physical comfort, and he has the strength and perspective to live accordingly. Excessive physical comfort is often addictive, ultimately unsatisfying, and leads to sadness and weakness. Per the ancient stoics, avoiding it (the virtue of temperance) helps build the strength that makes it possible to escape suffering, and actually enjoy life more.

Two of the most famous stoics Seneca and Marcus Aurelius were among the wealthiest and most powerful men in Ancient Rome yet intentionally lived like you describe because they saw it as virtuous, but also helping make them personally happy people.

I am personally prone to chronic depression and have found that living simply and embracing discomfort helps me to be less depressed. I can afford to live in extreme comfort but I wouldn’t be happy like that, I would feel lethargic and weak… like a pampered pet and not a person with strength and purpose.

What you have described is living your life where you satisfaction comes only from purchasing comfort. Doesn’t that feel a bit empty and pointless? What is important to you in life? Couldn’t you do better at things that were really important, and thus be happier and more satisfied if you had cultivated the strength to not need those comforts?