Hey Jelly, those are some really interesting questions that regard the deeper body-development processes.  I have never had my wisdom teeth extracted, but based on the many people I met in grade school who have had Dental wisdom extraction surgery, I can say that other than the week or so of isolated recovery after extractions, I did not notice any unconventional behavior among them after getting the teeth extracted. 

However, even as comforting as it may be to have wisdom teeth removed, there may still be flaws with this process. I am confident that retaining as many teeth as possible will aid your alignment process (evening of the face) as the teeth's connection to the deeper underlying bone structure of the mouth can make chewing easier or less painful than if the lower wisdom teeth were removed (If it is too painful to keep wisdom teeth, removal may be a fitting choice).
I am unsure if when mewing without wisdom teeth, specifically when using the muscles around the back-palate(cheekbones/upper wisdom teeth, and neck/jaw/lower wisdom teeth) to widen the bite (open wide and tall) will hurt or not, and if the potential pain could inhibit the potential bite capacity. 

I think if you are willing to listen to the doctor's perspective to remove some of your once-in-a-lifetime bone settings without understanding it, then we may be able to learn from the experience about how alignment of the face occurs after wisdom teeth have been removed. 

To your other ponderings -

"I read that the top wisdom teeth are support for the eyes."
- Cheekbones are the main support as they are directly under the eyes, wisdom teeth should not affect the potential alignment of the jaw. The wisdom teeth do not seem to be a feasible mewing structure press against to widen the mouth, as flared bite and pain may develop, in my experience thus far with a misaligned palate, I'm confident an aligned bite will have most if not all of the tongue pressed with the curved palate. I do not know if wisdom teeth will substantially affect the widening of the mouth to an even structure. 

"Can they even still perform this function without the lower wisdom teeth and having dropped a bit?"
- I think they can, as the bite alignment seems to preside over the rest of the teeth being aligned. And like a countertop hanging slightly over the an edge of a table, eventually a stable bite can be reached. 

Also you mentioned getting on yourself for a knowing lack of flossing which is something I am participating in as well... Doing better is a choice

My tooth restoration plan can clean and confidently reduce the pain of cavities (long-term may need to be filled by a tooth-cleaning service if it the cavity is too difficult to reach and clean)

1. Floss after plaque/scrap buildup (especially the open back of the wisdom teeth/molars)

2. Gently brush with a mostly dry toothbrush in and around the plaque buildup and cavity center to brush it away.

3. Reach into mouth with your attached hand and scrape plaque off the sides of teeth with fingers and fingernails. (Can be trimmed, Be careful about trimming past the white edge)
OPTIONAL 3B. GENTLY scrape plaque off or away from teeth crevices with a Dental Scraper Pick Tool  (WARNING, may cause severe pain if pressed too hard)

4. Brush with a toothbrush and cleaning paste.

5. Swish cleaning solution around mouth and in-between teeth. When satisfied, rinse. (I swish GuruNanda coconut pulling oil for 5+ minutes - https://gurunanda.com/products/gurunanda-pulling-oil-original-formula)

Hope we may all have restored teeth and palate

P

I was at the dental hygienist and it seems like the cavity is very shallow, it cannot even be seen on the x-ray yet. Now, I found this tooth powder that supposedly can remineralize teeth to the extent that some cavities get filled naturally. One customer only had 1 out of 11 cavities left after 3 months. The product is called Shine by OraWellness, it contains hydroxyapatite at 70 micrometer (nano is effective, but risky), xylitol, sodium bicarbonate, kaolin clay, calcium lactate, magnesium carbonate, salt and essential oils. So I'm going to try this and then hopefully extraction can be prevented.

@ps24chen thanks for your time. I'm hoping the tooth powder+good brushing and flossing and 6 monthly professional cleaning will be enough.