‘Write Your Own Framework’ and ‘Re-Invent the Wheel’ are not good ideas and won’t make you a better coder, you’ll just end up writing more bad code. Instead I’d recommend aspiring developers to get involved with an established open source project; its easy to find something on github.com which piques your interest and needs help/bugfixes/new ideas. Learn the codebase inside out, commit patches and you’ll pick up a tonne of good practices which you can then apply to your own projects.
Becoming a better coder doesn’t entail using a vanilla text editor and no browser tools. These things are there to help you and make writing code easier; it’s still important to understand the underlying technologies, and why things work the way they do, but forgoing the development tools of the last 10 years isn’t useful.
They are indeed crazy tips, I hope nobody follows them.