Why do states allow hunting some animals and not others? Why do states distinguish between different forms of income to tax? It's all implementation details.
It's like if someone killed my dog with 3d printed gun and so everyone started talking about banning or regulating 3d printers. It's like, yes, debating 3d printer regulation is probably a worthwhile debate to have, but regardless of where we end up on that it doesn't change the fact that that person killed my dog.
We should be having a debate as to whether there are certain things that are off limits to bet on, but regardless of where that debate goes, if a state has banned sports betting, it should be banned regardless of the platform.
Arguably bans on cellphone use while driving are a good example. It's not that it isn't bad, it's that distracted driving already carries a hefty fine without being specific as to the mode of distraction. So does causing an accident, which presumably is the harm we're actually trying to avoid.
I think their point was that your "going to struggle to argue a case" belief does not logically follow from a need to argue "over implementation details"