Nope, not doomed. I found I can add things that most here don't and still loose, BUT it's because I've found out my body can handle it.
Since we're eating this way for LIFE, heck, everyone needs a treat now and then, and IF you can handle it, I say WHY NOT. But, once that treat is over, it's back on track.
I know a few people here have posted that they treat themselves on a certain day of the week and it works for them. Yes, you can go by the book, yeah, you can fuss that this person isn't doing things like they should, BUT...if you're going to eat like this for life, you have to find what works for you!! If having a treat once or twice a month keeps you eating more healthly, AND it doesn't bother weight loss or cause you to binge, then I say WHY NOT!!! As long as it helps you stick to things better.
While a lot of people here are satisfied eating like this all the time, there are others who see it as being deprived, because that's the way we were brought up. And it causes negative attitudes or an easy "I'm tired of eating this way" mentality. It happens, people just have to accept that some people can treat and not binge and then get back on, but some cannot. The ones that can, well, I say go for it.
Ok, off my soap box, for now.