I'm a farmer and there are some aspects of the dairy industry that don't sit comfortably with me. Not the same ones you have highlighted mostly though.
Don't be under any illusion that dairy cows are being forcibly milked. Being milked is the highlight of their day and they literally queue up at the milking parlour to get in.
Anyone who works with cows on a regular basis knows its pretty much impossible to get them to do something they don't want to do.
Cows are beautiful creatures, some have lovely personalities (some don't) they do have soulful eyes, but don't try and extrapolate that to them having human feelings though.
Don't point the blame at farming, point the blame at supermarkets who have created a market environment where farmers have to use dairy animals (the same applies to milk sheep) as machines rather than farm animals.
People are always going to eat/ use milk. Even if they don't buy pints of actual milk, cheese, cream, butter, powdered milk etc and its by-products are everywhere. There will always be market for it.
Instead of making a superficial change to plant juices why not lobby the supermarkets and major food producers to pay more to farmers so that they be less intensive.
Although we all know that cost will only be passed on to the customer....