WWWM2 - your GS should go for it. If he completes the course he will no doubt get a well paid job in a developing industry and will be able to meet the repayments. You say that he would never dream of any debt so presumably he has no plans for buying a home in future.
The problem is that during the sixties when most of us on here were in school and thinking about our futures, only 4% of school leavers went to uni. Now the percentage is 28% and the country cannot afford to pay for them all.
I have some tax clients who are self employed (some with part time jobs) who are paying off student loans. I've just completed the 2019 tax return for someone with taxable income of £25,250 and his student loan repayment was £22.00 - hardly a burden. This year the ceiling is £25725.
Alphabetical girls and boys names January 2024