nah dude, mystery seeds can be something very interesting. I actually grew some bagseed from shwag for my first grow and got some of the stickiest and dankest bud I've ever smoked. You never know if the father that pollenated the female caused some really good properties to stand out in each strain, or if the plant was hermaphrodite cause of seeds, that means you have way higher chances of female. I also did a grow a long time ago from bagseed that failed early on, but it was already COVERED in trichomes even in early veg mode and I guarantee that shit woulda been awesome. Plus, if they die or anything happens while you gain experience, you didn't waste your expensive seeds where you atleast have a general idea of what you're gonna get. I say go for the mystery and use it as a learning process!