In a Java program, some programmers might argue that when it comes to storing names, addresses, phone numbers, and so on, string objects work as good as StringBuilder objects. Take your position on this argument, and provide at least two (2) examples to support your position.
Assume you had a task to convert a string object to a number. Speculate on whether or not you can convert any string object to a number with or without limitation. Justify your response.