Just wanted to add a few points about dentistry VS medicine topic (disclaimer: i have a slight bias in preference towards dentistry)
1) Dentistry is a career that requires a lot of manual dexterity. When an occupation has a need for such requirements, you have the capability to make an immediate impact on a PT's life within the span of 20 minutes to a few hours on the dental chair. If you feel like you would gain satisfaction through the work you do with your hands (and not just through administration of medications -> ofc, this is just a generalisation and the medical field is definitely much more than this -> eg. surgery in hospitals), dentistry is a much more rewarding in that aspect.
2) Similar to above point, dentistry is a physically-demanding career which can predispose you to a lot of back injuries if you do not look after your body well from an ergonomic perspective. Whilst the core of a healthcare profession is to look after and provide your PTs with the best care possible, not being able to look after your body can potentially put an early end to your career. Similarly in medicine, I have heard rumours of on-call shifts being 24-36 hrs potentially in early residency years (ofc, this is not often the case but if sleep & lifestyle is an important priority for you, it might be something to consider)
3) In the medical field, you tend to see doctors mostly when you are sick or injured (unless you are getting vaccines/blood tests/x-rays, etc.) In dentistry, the amount of times you encounter sick PTs is a rarer which means that there may be potentially less transmission of disease/illness to you (ofc ->oral conditions, aerosol particles, bad breath is something to consider in the dental setting but I don't often hear about dentists contracting sickness from PTs as compared with doctors). As a general dentist, you do a lot of prevention treatment for PTs (eg. checkups, fissure sealants, cleans, oral hygiene instruction, fluoride varnishes/gels/foams/tooth mouse) which then help to reduce the need for surgical intervention (eg. fillings, root canal, implants, crowns, bridges, etc.). Generally you do more prevention in dentistry compared to medicine.
4) As dentists, there are quite a number of similarities to the medical field. You have to learn a lot about physiology (eg. how does blood pressure contribute to stress levels of PTs in dental chair, orthostatic hypotension, immune response -> how that leads to inflammed gums, etc.), medications (a PT's medical history plays a key role in whether you perform certain dental treatments or not - indications/contraindications as well as management in case a medical emergency occurs) & pathology (NOTE: dentists are often able to diagnose illnesses earlier than doctors just by looking at facial features & inside the mouth -> eg. oral cancers, GIT reflux disease, mouth lesions -> they can then refer to medical GPs/specialists and potentially save a PT's life before their condition worsens)
This is not an exhaustive list. I am only a 2nd year dental student and some of the things I state about the medical field may not be fully accurate but this is me generally speaking from the many experiences I have encountered throughout the course.