This is a terrible overview. The actual primary benefit of toasts is that they provide feedback on low-importance events without requiring the user to interact with them and without permanently taking up UI space. The web application I use most frequently would be infuriating if I had to deal with a modal window every time a toast would have been used, and UI space is at a premium for useful functionality, so occupying a permanent spot to relay those messages isn't a good solution either.

I wish software developers could drop this dogmatism. Same as the old Goto considered harmful trope outliving its usefulness and all that. It's always black and white - "people can misuse this tool, so this tool is inherently bad and should be eliminated from usage completely" - rather than acknowledging that many tools have great use cases even if they can also be abused.