On Safe: Smart contracts ensure only the right people have read and write access to the data with no way to cheat. The records are also safe in case of hardware failures so there's no way the data can be lost in an accident.
Scalable: There are a few aspects of scalability. The one you are referring to and what most people think of is number of transactions which is indeed limited right now but for most data is good enough, especially with L2s like Optimism and zero knowledge rollups. The other aspect is social scalability. If you want a system of records to be available to more people then the organization running it is the ceiling for how widespread adoption will be. A birth records system for Peru will never be used by Brazil, the US, or anyone else. For a system to scale larger than a single country then it needs to be credibly neutral where no person or organization controls it and everyone can trust that the system is fair. That's the kind of scalability that smart contracts offer. Worldwide systems that scale to anyone who needs to use them.
Scalable: There are a few aspects of scalability. The one you are referring to and what most people think of is number of transactions which is indeed limited right now but for most data is good enough, especially with L2s like Optimism and zero knowledge rollups. The other aspect is social scalability. If you want a system of records to be available to more people then the organization running it is the ceiling for how widespread adoption will be. A birth records system for Peru will never be used by Brazil, the US, or anyone else. For a system to scale larger than a single country then it needs to be credibly neutral where no person or organization controls it and everyone can trust that the system is fair. That's the kind of scalability that smart contracts offer. Worldwide systems that scale to anyone who needs to use them.