Making stuff for ‘everyone’ is a bad idea.
Products or services that are for everyone, are easy to make and are plentiful. They are generic and not memorable.
The problem with offering a generic product or service is that you are reduced to a number.
The alternative is to offer something specific to a targeted group of customers, something that may be no one else offers. This makes you unique, memorable and allows you to make a difference.
The aim is not to serve everyone but a meaningful few.