I think the problem isn't that the forced changes are bad, it's that they're lumpy. If you're doing incremental development, you want to be able to to quickly make a long sequence of small changes. If some of those changes randomly require you to turn your program inside-out, then incremental development becomes painful.

Some people say that after a while, they learn how to structure their program from the start so that these changes do not become necessary. But that is also partly giving up incremental development.