It's true in one sense. I did launch a product (https://www.vim.so), and I did make $5k in revenue within 14 days.
What it leaves out of the picture is the previous 4 years of indie hacking unsuccessfully.
Highlights of my indie hacking career:
2016 started programming
2017 ReviewTxtr - $0
an app that helped local businesses get more reviews through text. Never launched it. $0 revenue
2017 LeadTempest - $150
a direct mail service that sends marketing letters from contractors to people who had property disasters at their house (i.e. flood, fire). Had one contractor pay me once for the service
2018 Crypto things - $0
worked on various crypto projects and never launched any of them
2019 Ottofield - $0
A ML chatbot for home service businesses.
2020 deliberate.so - $0
Mild success. Around ~100 users. Lots of people love the product but it's in beta. Started getting some traction and confidence
2021 https://www.vim.so - $5321
Built and launched MVP in 3 days. $5321 revenue generated in the first 15 days.
Used a bunch of the tech from Deliberate to build this.
Keep indie hacking! It might take a while, just enjoy the journey.