No, Sasuke doesn't protect anything. Not unless there's a problem and Naruto sends for his assistance. He just went sight-seeing and left his family behind for years on end for self-fulfillment. He claimed it was to see what he missed out on the first time he traveled as a nukenin... this is contradictory since in a world of assassins, there is nothing to see. There is peace now, no conflict and there hasn't been for years. He's just going to see people he already saw and is effectively leaving what he missed the first time... his bonds. This time, it's even worse though since he rambled on about how important family was to him and he decides to leave his actual family for years on end. Plus, he retracted his ideology once he reconciled with Naruto. He's just someone having fun now, he admitted that he gave up his ideals.
Naruto neglected his son in favor of a meeting he came up with and thus could reschedule, could have brought his son with him to the meeting, or he could have even made kage bunshins to spend time with him. He has no excuse to neglect him. Especially when the meeting wasn't urgent and had little point, they were even fine with him being late. Naruto and the kages are totally lax now, it's so peaceful that TenTen can't even sell a kunai. He should have more time to spend with his children than any other Hokage ever did.
And to top it off, Tsunade with conflict going on during her reign (Pein, Akatsuki, Tobi/Obito, Madara, etc), still had loads of free time and drank/gambled consistently. And she got things done. How does Naruto not have free time? Him being a neglectful father was just strewn together to give a conflict to the part 3 coming next spring via Kishimoto's assistant. Nothing more.
Because Salad made it clear with her remark. Lol