How do you measure how civilized a culture is? If it is their choice to remain un-contacted, they should be free to live that way. You cannot make an assumption that they would die young. Their bodies would have developed systems to counter most of the natural viruses and other health aspects there. Their upbringing would have taught them the skills to live in harmony with the forest. Their brains would not have developed the adequate techniques to survive in our society. Getting them out of there is the worst possible thing that you can do to them. They have got their technology and we have ours.
What is comfort to you is only a conditioned response? Car is a great comfort only if you want to travel long distances. They have crafted their lifestyle in such a manner that they do not need such comforts. Most of their building materials and techniques would take care of air conditioning and cooling. They consume so few resources that their carbon foot print is probably negative.
As far as education is concerned, we use this education to survive in this society, to earn, to create and transact with goods and so on. Their society is not built on such structures and transactions. They would have different structures and transactions. One is not necessarily superior or inferior. They are merely different.