Etsy is hard and easy at the same time. I know it can be confusing, but that is an honest opinion.
Most Etsy sellers have a multiple niche stores so they are making sales every single day - so then it is easy to get profitable. They are making money, they can reinvest more.
But if you have a one store, it can be hard. You cannot expect a daily sales and it can be quite demotivating.
The point of the article is - Yes, it is hard to sell on Etsy, with all the competition, but it is still the best marketplace for people who want to sell designs online.