If you can’t be trusted to avoid the porn and gambling sites, by all means donate your smartphone to a shelter for victims of abuse and stay off the internet. But I would suspect that for most of us…
Charlie: “?? ????? ????? ?? ??? ????”. The Gemara brings stories of how the Holy Tannah R’ Meir, whose Madreigos we cannot begin to fathom, was seduced by the Yetzer Hora and began climbing a tree to do ????. The ???? tells us about the Kohen Gadol of 80 years who became a ?????. The Issur of Yichud applies equally to those who believe they can control themselves. No one is safe.
A Bochur once wanted to go to a mixed (seating) wedding of a relative, and asked permission from R’ Leib Lopian zt”l. R’ Leib asked him how he could go to such a place? He replied that he was going to sit separately with a sefer, and he ‘wouldn’t look’. R’ Leib smiled at him sadly: “I’m 80 years old and blind in one eye, yet I am scared every time a walk in the streets that I’ll see something I shouldn’t. You are 20, young and impressionable, and you are going to walk into a matzav of nisayon like that?”
It could be that most of the time you do have the self control. But are you telling me that you have never been ???? on an unfiltered smartphone? You have never seen one indecent photo?
And I’m not talking about pornographic websites either; I am talking about normal, everyday websites with photos that are – and definitely should be – below your standards. Challenge: Can you honestly tell me that you have never seen anything you shouldn’t have?