It's a very tricky and contentious question that the OP posted here.
The simple answer, as in life, nothing is impossible if you look at enough cases. Some people will manage to become controlled in gambling again, others will never and can never.
I have certainly been an addicted gambler, but I've never really stopped gambling fully, and still have not. However, it no longer rules my life, and certainly not my finances.
I think it really depends on several factors. It will never be possible while the situation in a person's life is not amenable. I think to be able to ever gamble again with control, a person needs to become stable in their wider life, finances, social setting. If anything is fundamentally wrong (as it used to be for me in several areas of my life) it can't be controlled. I feel I've reached a point in my life these days where I am happy enough with everything, and that meant gambling was not a big deal either way for me now. I don't need it to make money anymore, and I can ignore it when I want.
That has only been something that happened to me in the last couple of years though - before that I was a desperate gambler. Getting on top of all my issues had to happen. Not least my employment settling down again, and debts being more under control now.
Because I've never been one of those full abstinence people on here, maybe I could more easily move to this way now. And if I hadn't settled my life down financially I might not have been so calm about it now of course, and not at all controlled still.
I know some will suggest I am also still putting myself at risk of a blowout. But it hasn't happened for quite some time now, and I've had plenty opportunity for that to happen along the more recent way.
So, returning to the question asked, if you have any serious doubts about how money, gambling and your general life feel in relation to gambling, then don't bother trying to control it just stop. But, for some it might just be a better way of controlling the beast, IF everything can be controlled.