You will still need the game once to install the 'Fake News' applet, after that you can launch PegaSwitch directly!
Good news in the form of 'fake news', ReSwitched Developers have found a way to get rid of the need of always using the game Puyo Puyo Tetris JP to launch the hidden 'browser' on your launch v1.0.0 Switch firmware, now you just need to follow the steps once!
@blinkzane also points out in his GBATemp thread linked below, that this can be useful to run the recently released 'scripts' that can dump cartridges, now that you can remove PPT and insert a different cartridge, and that is possible to run this on v3.0.0 also!
MORE INFO ON OFFICIAL GIT: --> https://github.com/reswitched/pegaswitch
NEWS SOURCE #1: @SciresM (via) Twitter
NEWS SOURCE #2: @SciresM (via) Twitter
NEWS SOURCE #3: Launch Pegaswitch script without puyo puyo on 1.0.0 (via) GBATemp