Think bigger people travel back in time to learn from the best for we do not learn that the best are the best until they are gone.
Art, science, any interest you may have could be learnt. To travel through time to alter the past and create a paradox may hurt more then are saved. You may change suffering for one time to another. What has happened must stay in our past no matter how painful , for the past is a part of all of us. Only after everyone agrees that this should happen should it happen. When I say everyone I mean everyone that would be effected past , present , and future. Sometimes the event will make or change morals of every one in the future. Hitler was a good example to remove him from our history would the morals change in the USA on how to deal with the homeless, race problems , and so on . It is hard to say .
Then of course is the time traveler the best to change our history? Each person has their own agenda on what should be changed. The moral question will come up when changing history and that is "If we save 6 million from dieing in the second world war and as a result we kill 1 in the future is it worth it?
To me it is worth it , however what if we save 6,000,000 in the past and 5,999,999 die in the future as a result of this change in the time stream? Is it worth it? To me it is not worth it. I am not the one to chose who dies or who should be and who should not.
However i still want to travel through time.