Is going all natural good? My question especially concerns medicine. Of course there are many pseudo naturalist doctors out there; but if we had access to the real ones, would their treatment be better than modern allopathy? What are your opinions about other fields?

for your contributions.
Going all natural is definitely better than taking medicines. you can start by taking natural remedies for things like colds or flu. if i ever get a sore throat or colds, nothing works more like a charm than cinnamon tea.
If i get toothache, i mix fresh turmeric powder with a little water to make it a paste and it takes away the pain in 3-5 minutes. i have to do it a couple of times but by the next day, my pain and swelling is completely gone.
my grandma, she has passed away, but when she got high blood pressure, she only ate fresh, lightly cooked vegetables for 2-3 months (she stopped taking her medicine after 2-3 weeks after starting this diet) and she never had to take her meds again. and my grand dad would never use the extremely harmful fluoride laced tooth paste. but rather only this homemade paste from cinnamon and some other things. he only had 2 fillings in his mouth through out his life.
I always prefer the natural remedies over medicinal ones because you build up resistance. plus almost all medicines have some side effects. There are some side effects with natural remedies too if you are allergic or something, but then that is where you have to know what it is you are putting in your body. There are some excellent resources available on natural remedies that are available if you want.
When I was a kid I had a pneumonia that would not quit. I had it for six months. The MDs gave me antibiotic after antibiotic, and nothing worked, in all that time. Finally my mother took me to a homeopath, he put vials on my chest and had me try to keep my arm up in the air while he pushed on it. If my arm fell down, he prescribed it. I took thirty supplements a day for two weeks, ate some chicken, and then my pneumonia was gone.
So, I don't know. True story.
Back in UAE, my mom was horribly allergic to grapes. even eating half or just one sip of its juice would make her nose run like an open tap. and just like you, she tried EVERYTHING until she went to this homeopath who gave her these tiny white round sweet balls. it worked like magic.