Who cares, though. Like how many people do you think are going to abuse the cloud exploit, it involves a lot of micromanaging of the save data to even do it and to properly take advantage of it you need to rope in other people.
But it's still there, available as an option. Leaving it there and available to exploit is no different from leaving an exploitable glitch out in the open. Just because not everyone will exploit it doesn't mean it shouldn't be fixed.
In AC's case in particular, Time Travel is significantly more obvious, easier and is approximately as cheaty in the long term.
To be fair, if it were possible to make time travel impossible, I'm sure they would. I'd certainly support any such attempt.
And Pokemon's method of cheating has been around so long it's probably even easier to set up than standard hacking would be.
What is it you're referring to here?
And then what about something like Splatoon? They store ranking data server side since you can view that outside of the game. So now you're just screwing over everyone for something that should be more than possible to track and autocorrect upon connecting to the internet; meanwhile actual cheaters can just do things with reckless abandon.
MEANWHILE Smash Bros, Mario Kart & Mario Tennis have a ranking system and cloud saves and no one cares.
Don't play or know anything about Splatoon, so I can't really speak on the topic But I'll admit that judging purely by the way you describe it, that does sound like a rather arbitrary choice, but that's only in the context of Splatoon, not Animal Crossing (or Pokémon).
And, frankly, hacking your switch is really not that hard. You need to google a guide and a SD card, last I saw you didn't even need specific software bought to enable it. It's why hacking is as rampant as it is, though not as much as on Wii.
Maybe it's not hard, but it's not something that anyone and everyone can do. There's also the moral component to consider. I would suggest that most people would never consider installing hacking software, as it crosses a clear moral line. Exploiting your game with cloud saves isn't as clear of a line, and many more people would justify it as being alright, since they're just using the tools Nintendo provided them with.
There's also the fact that hacking is inevitable. People are going to do it no matter what Nintendo does. But just because that's the case, doesn't mean Nintendo should try any less to cut down on the number of possible exploits.