First of all, this will depend on the particular person, for some people, the "Cold Turkey" method does indeed produce the best results.
However, generally, it's not easy in the sense of being able to keep it up: a gradual cessation can make it easier for people to stay away from cigarettes.
So the statement is false.
That statement is true
Scientific pursuits give humans more capabilities in understanding the universe. From finding out the history on how certain objects or phenomenon happened on how to utilize things/resources that available in the environment for our benefit