"Surely when you love someone and have a family with them you don’t just walk away when they’re going through something?" You do when their actions are harming those children. They take priority over an addict.
They deserve to live in a secure, tension free home.
They don't deserve going without, having God knows who coming to the door demanding money, their home at risk, their mother on edge constantly due to the stress.
"but if he physically doesn’t have access to our money then how can he? He can’t get loans etc because his credit is low." Gamblers ALWAYS find a way! If he has no access to legit sources he'll use your name, sell stuff (do you have a half decent phone? Jewellery? Car? including the kids stuff - what ages are they do they have items of value? Phones? Gaming equipment? Bikes?), get in debt to loan sharks, steal...
3 things always true if you have an addict in your life:
You didn't cause it
You can't control it
You can't cure it
Maybe these people can help
www.gamcare.org.uk/get-support/partners-friends-and-family
But honestly, as someone who comes from a family of addicts THIS is the one that never seems to get "cured". Alcoholics & drug addicts eventually their addiction makes them very ill or dead and that stops them/motivates them to stop, ditto exercise addiction - the body stops being able to take it. There's no such issue with gambling. They can gamble till there's 100 from their death bed! They're also ime the ones most likely to relapse.
"He’s actually the best dad I’ve known, far better than my own or any of the other dads I know. His children are his world and I know he would do anything for them" anything except not gamble, not leave them short, not ruin their Christmas...
How bad was your dad you think he's great? Less bad does not equal good.
"he’s not abusive." Yes he is - financially. That's even recognised as abuse legally.
"You think I want my children to suffer? " you're not doing what you need to protect them though.
"Addiction is a family disease." Absolutely, my dads alcoholic but my mother enabled him from the beginning.
My siblings and I would have been FAR better off in a "broken home" than we were in a supposedly whole one. It's a facade. Your home is already broken you're just ignoring the debris!
I'm 46 I'm still suffering the consequences of my mother choosing to stay with an addict, as are my siblings. 2 of us Dx serious ongoing MH issues, the 3rd barely has contact with any of us and has a very tight rein on all areas of his life, it worries me what will happen if something happens to affect that.
The worst gambler in my family lost 2 families, 3 houses, numerous hospital stays due to punishment from bookies & loan sharks (dead men don't pay so they "just" break bones, threaten their families instead. I've heard of gamblers kids being kidnapped).