SQL is a language commonly used to minupalate data in databases. If you are ‘just a home user and perform simple tasks’ you don’t need it.
But, you might be talking about ‘SQL Server’ which is not the same.
SQL Server is a database management system from Microsoft. Most likely you don’t need it directly, but some application installed on your machine may use it to store its data.
We would need to see the list of programs you mention to be able to help you determining whether you need it or not.