You get people asking about problems carb or not on a scooter forum because they aren't as likely to be here if they aren't having problems. It's like going to a hospital and observing that people are sick or injured in some way, so people in general must be sick or injured everywhere. People don't tend to hang out at hospitals or clinics to say life is going superb.
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I would buy and ride a carb bike. Bikes don't like to sit unused. Even EFI bikes will have other problems from neglect, like dead batteries. In North America, bikes aren't treated as daily commuters. They're fun toys like boats and sports cars and snowmobiles that sit for half the year or longer. Look overseas in places where people use these to get around instead of cars. I expect much fewer requests for carb cleaning, and maybe more requests for high mileage engine rebuilds or tire choices.
I have never had a carb issue on my Bet and Win 250, and it is still humming along at 23000 km for the third owner. I don't even recommend that my friend cleans the carb out for the heck of it.