Question about Protein Powder, I'd like to start adding it to smoothies to turn them into meals
The OP wants to make a full meal out of a smoothie. I think wanting to add protein to it, in this case, is absolutely understandable. It's not so easy to feel full, otherwise. Might not have anything to do with a misguided quest for excessive protein.
So, to get back to the main discussion... yes, as far as I know, protein powder is more concentrated in protein than most other sources, so it could be worth it.
If you're seeking a more wholesome option, you can look into adding natural sources of protein into your smoothies, though you'll need to use more of them to get the same amount of protein and therefore could turn out more expensive, compared to if you were using the powder. E.g. nuts, yoghurt, even raw eggs, if you're not iffy about them. I prefer minimally-processed sources, but I do also have a tub of protein powder - I chose a good quality pea protein powder, which I have to say doesn't taste great, but I am able to camouflage it with other things I add to my smoothie.