When you buy a vegetable beverages, as soy, oat or rice "milk" (there are more of them) you should take a look to the ingredients composition. Most of them have 6% of soy, or oat, or whatever you buy (rice, almonds...), 13%... I think I saw 15% at the most.
Besides, most of these vegetable beverages use genetically modified grains. We don't know if these transgenic products are safe for us.
The ads explain you that soy is so good for your health, it has good quality and good proportions of proteins, it has isoflavones, omega 3 fatty acids, minerals as zinc, iron, phosphorous, copper...
Yes, soy has good quality of proteins, but you can get the same proteins from the meat and if you don't eat meat, you can get them from a combination of legumes and cereals or legumes and seeds, for example.
It has isoflavones, it's true, but there are others legumes as chickpea and lentils. I meant, you can eat soy but you should know that is not the best product ever.
Omega 3 fatty acids, you can get them from other products, as you know oily fish or dried fruits.
It’s also true that it has important minerals for our organism. But it also has phytic acid, which reduces the absorption of some of these minerals. It happens with others vegetables or legumes.
Did you know that you could cook your own vegetables beverages? I've never tried to cook soy "milk", but oat "milk" is easy, fast and cheap. Take a look:
And there are more and more videos...
In summary, we shouldn't believe all the ads explain, I think is better to research, to ask, to look for other opinions, to experience... it's the way we can decide...