Hello Z,
In Singapore, general dentists are trained to remove wisdom teeth.
You can see your general dentist to have an assessment of the position of your wisdom teeth with X-rays and determine the difficulty of removing the tooth. If your dentist feels that there may be difficulty e.g, the wisdom tooth is dangerously close to a nerve, then your dentist will refer you to an appropriate specialist. If there are no problems anticipated with your tooth, then your general dentist would be well able to remove it.
Certainly, you can see a specialist directly to remove your wisdom tooth.
Note that fees that specialists charge are generally higher than general dentists. So if your wisdom tooth is easy to remove and you see a specialist, you would be incurring higher charges than if you had your general dentist remove it.