You don't need a strap, when you're building it you can touch the inside of the case to let off static, and then put parts in. Also, everything is labelled and it's impossible to put things in the wrong spot. Just have patience and it's really not hard.
Also, gaming laptops may be versatile it comes at the cost of longevity. In 4 or 5 years you'll need to spend a grand on another one to be able to play the newest games. With a desktop you just upgrade what you need.