As a full-time freelance writer, I barely make enough to get by, at least, for now. If I can afford to eventually save money for retirement, then yes, I will.
The problem is that writing is so in my blood that I would do it even if I wasn't getting paid, and I have. So even if I would retire, I would still write.
Eventually, I will get so old that I won't be able to write. At that point, I will have to fall on my retirement savings, assuming that it will be there.