DO NOT listen to anything this article says! This is absolutely terrible and incorrect advice. Gaming laptops are TERRIBLE investments and after a couple years of use, especially for gaming, this system will have to be replaced due to many issues. Gaming laptops are the epitome of scams and bad value. The price to performance ratio (any reputable PC builder that knows what they're doing will mention this) will tell you that laptops are terrible investments in this area. For $1,000 you can build something that is leagues better than any gaming laptop will give you (price it out yourself on PCPartPicker or your favorite parts site, and you will easily see this).
Just because the author of this article clearly made major mistakes during their build and got frustrated because they clearly have no clue what they're doing, doesn't mean you can go around giving terrible advice to consumers. It is your job to report on the "best bang for you buck" and informing the masses on the best they can get for their money.
With this all being said, there is a market for prebuilts, laptops, all-in-ones, but these will never be better and give you that price to performance ratio for your hard earned cash.
Many more reasons can be said but I'll leave it at this for now.
Masters in IT and over 15 years of corporate/consumer/retail experience in all kinds of technology.