So, the rock is the guy that carries muscle mass 7 - 10 times what normally fits his frame because of steroids supporting it instead of his gonads, right? Obvious answer then is -no. Not unless you are blasting all kinds of PED.
I am no expert by any means, but my experience (in decades of sports and experimentation) is really close to a study I 've seen in the past, that proposed 0,8 to 1,6-2 grams per kg of bodyweight. I go for the upper limit when I increase activity (especially strength related, instead of endurance), I go for the lower limit when I decrease activity. Been healthy and strong during all this time.
As for food I try to find the least amount possible my body needs to process (why overload my vital organs? is there a good reason?) in order to support my lifestyle (active, and heavy on sports). Going for the most amount possible without a good reason, I consider greedy and harmful for both the environment and the rest of the people. Resources are not limitless.
As for the expensive part, protein exists in cheaper foods too, not everyone relies heavily (or at all) on animal products. Simple (cheap, especially if you prepare them yourself) examples: legumes & beans, seitan, tofu (and all kinds of tofu related products), tempeh. Especially legumes & beans are incredibly rich in most of the other important nutrients too. One might consider vital wheat gluten a protein powder (almost 80grams of protein in 100grams total), even though its lacking a bit in the amino-acids that legumes/beans are full of, comparing the price it has with an actual protein supplement makes it pretty clear what overpriced means.
Pea Protein is a complete protein with all of the essential amino acids. It has slightly less of a few of them, but there are scientific studies showing equivalent or almost equivalent (depending on age) value as whey protein. An added benefit is that it doesn’t leave you feeling bloated or give you gas and your skin will look healthier than when consuming a lot of whey.
Well, I try not to use supplements when I can go for real food, so I wouldn’t know which protein powder is more effective… I enjoy peas even though I don’t eat them often. The foods I mentioned were examples of cheap protein sources. Vital wheat gluten (which is actually an ingredient for meals) is more than 4 times cheaper than pea protein powder in my area and roughly the same amount of amino-acids. All the rest of the nutrients (and the amino-acids it has on lower concentrations) gluten doesn’t have and may exist in a pea protein powder supplement, exist in the rest of the options I mentioned :-)