Soy beans have complete protein, usually you have to combine grains and legumes to get complete protein with vegetables only.
They are a hardy crop and add nitrogen to the soil, so they are overall popular to grow.
If you enjoy Asian cuisine, there are a wide variety of products and flavours. The cheap Chinese brands I would stay away from, but there are as many (or more) flavours of Japanese Miso as there are western cheese, if you enjoy cooking at all, there are a wide variety of excellent soy products to choose from.
Soy contains decent amounts of calium, folic acid and iron, it has carbs and "good" fat, it has low to nil saturated fat. So it is a "better" replacement for meat, since getting an equal amount of protein from meat will give you a lot more saturated fat.
Soy is definately not a a "scam", it is healthy and economical to grow, and good for the soil so it has long term benefit for farming, as opposed to buying expensive fertilizer. But like any product, if it just ground and processed and mixed in bulk with another product, then it's it's just processed vegetable protein, there's nothing healthy or unhealthy about it. Like any product, if you buy a cheap brand with lots of additives, then you are getting lot's of additives.
If you have a taste for meat, meat and nothing but meat, then soy doesn't taste like meat, it tastes like something that tries to be like meat. But if you enjoy a variety of foods, then soy, miso, tofu, etc have their own distinct flavour that when cooked and spiced properly are fine tasting and fully nutricious and healthy.