Only the absolute poorest Chinese won't be able to get internet access and a computer. The computer might cost ~1000 RMB (2 month's salary, for an extremely poor household). Maybe less, if they can put up with an old P4 getting tossed out by an internet cafe, which is now the color of a smoker's lungs. Internet will be ~50 to 100 RMB a month, and that's entertainment (and information) for the whole family. Getting access to online courses (which might rely on YouTube, which is blocked) might be tricky, as is the language barrier, but I'm sure China will have localised versions of the course. It's a major cost, but Chinese aren't starving, just poor. Once you have more than $2 a day, food isn't the only priority; healthcare and education is.
Migrant workers might be worse off than the poorest peasants, though, as they may not have a stable abode. You can't get your kid a computer if you're sharing a shanty-town room with 2 other families. Plus, getting a connection might not be possible. That's probably why migrant workers often leave their kids with grandma.
And yes, credentialism is an issue.
> That's probably why migrant workers often leave their kids with grandma.
Not really the main reason. Without Hukou, their kids can't even attend school. China is almost a caste-based society these days, where caste is determined by your Hukou.
Well, not really, there is a huge part of online courses translated/subtitled to Chinese. That's my wife's job actually.