I find your objection quite strange. If it _is_ possible, and it _is_ dangerous, than it would be critical to understand how it works, lest it be abused. That

I find your objection quite strange. If it _is_ possible, and it _is_ dangerous, than it would be critical to understand how it works, lest it be abused. That being said, understanding time travel (even if it's impossible) is very important for getting a better understanding by what we mean by 'time' in the first place.