Does the rule "warding off evil takes precedence over securing benefits" apply to my situation regarding delaying quitting smoking due to studying?

Many smokers have quit smoking all at once and endured the withdrawal symptoms, which are most severe in the first three days. Gradual cessation may lead to inability and a return to heavy smoking. A recent study indicates that sudden cessation increases the chances of success in quitting smoking. It is advisable to seek assistance from a doctor specialized in treating tobacco addiction. If sudden cessation leads to severe detriment in one's studies, then gradual cessation may be permissible, and this depends on the judgment of specialized doctors.