why you should not drink water while standing?

Asalam alahekum.

Today we will talk about the etiquette and moral of drinking.
 We should always have it in our mind that prophet Muhammad S.A.W didn't say anything at his own will without the knowledge of our Lord, there is nothing good he has not encourages us to do and there is nothing immoral he has not warned us against . The best person to emulate is prophet Muhammad S.A.W if we actually want to have a perfect social, economic and political life as well as being healthy all the time.
Allah Subhanau watahala said in the holy Qur'an
     "You have an excellent model in the Messenger of Allah, for all who put their hope in Allah and the Last Day and remember Allah much. (Surat al-Ahzab :21)"

    "Muslim (2020) narrated from Ibn ‘Umar (may Allaah be pleased with him) that the Messenger of Allaah (peace and blessings of Allaah be upon him) said: “No one among you should eat with his left hand or drink with it, for the shaytaan eats with his left hand and drinks with it.” despite of this there are health issues associated with drinking while standing that the scientist has discovered after one thousand years ago.

Here are some shocking scientific reasons that tell you the difference it makes to your body when you have your water standing as opposed to sitting down.

1. Standing and drinking water can cause arthritis
This may come as a greater shock to you if you have been in a practice of drinking water in a standing position, for you may well be affected by arthritis later in life. By drinking water standing you disrupt the balance of fluids in the body, and this often leads to a greater accumulation of fluids in the joints thus triggering arthritis.
2. Water splashes on the stomach wall when had standing
Health experts have it that by having water fast and in a standing position, you let it flow to your gut while splashing on the stomach wall. This shock from the splashing of water can cause long term damage to the digestive system as it harms the stomach wall and the gastrointestinal tract.
3. You remain thirsty when you drink water standing
Your thirst is never fully quenched when you drink water in a standing position. You feel like drinking more water very frequently. It is better to sit in a place and have smaller sips to truly quench your thirst.
4. You always suffer indigestion when you drink water standing
When you drink water sitting down your muscles and nervous system are much more relaxed and it triggers the nerves to quickly digest the fluid and with it other food items.
5. Your kidney doesn’t filter water properly when had in standing position
Drinking water in a standing position doesn’t help the filtration process of water by the kidneys. Often impurities remain in the kidneys and bladder which can lead to urinary tract disorder and even permanent damage to the kidneys.
6. Drinking water in standing position doesn’t dilute the acid levels in the body
Even Ayurveda mentions it that water must be consumed in slow, small swigs while sitting down. This helps to properly dilute the acid levels in the body by getting combined with the necessary proportion of water.
7. Drinking water by standing causes ulcers and heartburn
When you drink water in a standing position it ends up splashing the lower half of the esophagus very hard. This in return can disturb the sphincter, which is the joint between the stomach and esophagus, and as a result the esophagus experiences burning sensation because of the acids in the stomach flowing backward.
8. Your nerves are tense when you drink water standing
When you drink water standing, a ‘fight and flight system’ is activated which causes nerve tension in the body. But when you sit down and sip water, a parasympathetic system also referred to as the ‘rest and digest system’ comes into fray, this one helps to calm your senses and ease the process of digestion.
We can now see that, we should obey Prophet Muhammad S.A.W total ways of life even if we don't understand the knowledge behind it, it's not a sin to seek for more knowledge behind the reasons as we can see above and how the scientist have been proving the words of Allah in the Qur'an.
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Salam. Alahekum.