Vegetal "milks" are not milky, they are sugared water...

https://www.rts.ch/info/sciences-tech/10283177-les-laits-vegetaux-s-apparentent-plus-a-de-l-eau-sucree-qu-a-du-lait.html?fbclid=IwAR0Wq1d4yHBpm_s-xUsBdRNk4eEsP85mHMJQMxZrueUL1XoqW87FDTxf2vA

So they are very expensive!

Vegans lie about "vegetal milk" and Big Sugar profits grow.

https://dysnutrition.blogspot.com/2017/07/milk-is-from-mammals.html

https://dysnutrition.blogspot.com/2013/05/consumer-choice-beats-state-regulation.html

Mammal milk worth the price! Choose grass-fed cows and raw milk and raw milk cheeses.

For more info on why you are better eating butter and cheeses than milk if you are adult read this short paper in the BMJ:

https://www.bmj.com/content/349/bmj.g6015/rr/804415 
(free access)