Integrated packages are often designed with casual users in mind. This might make them easier to use than more robust programs. The word processor built into an integrated package is probably more powerful than a typical text editor. Integrated packages are often already installed on new computers, so they might not cost you any more than the original purchase price of the computer. The word processor on an integrated package will almost certainly give you some features you would not expect to find on plain text editors.
Integrated packages have some disadvantages.
With the advent of graphic user interfaces and modern operating systems, programs have become more and more standard even if they were written by completely different companies. Also, as in the Swiss army knife analogy, the programmers had to make some compromises in order to make all the applications fit in one program. The programs in an integrated package are usually stripped down or older versions of the company's high end software. They certainly have fewer features, and might be less friendly.