If that were the universal experience of graduates I'd agree, but it's not. Not all university education outcomes are equal and some are better off long term not going and instead getting into employment earlier or learning a trade.
Still, the paying back part shouldn't be turning people away that really want or need to go to university to fulfil their plans. It probably will, which is likely a problem especially for those from poorer backgrounds. More affluent students may be able to get parents to cover part of it tonreduce the impact of the interest rate for example.
Theres also looking at it from the other angle. Those who do worthwhile degrees and end up with high paying jobs afterwards are doubly penalised. They pay more in tax from their higher earnings
and they pay more back from their loans, but at least when i went to uni there was a realistic chance of actually paying it back during your lifetime, which meant it was a worthwhile investment. As others have already said, its now become basically a tax on people who went to uni, as unless you're earning 6 figures, chances of paying it off within the 40 years are pretty slim.
Meanwhile those who do a degree with poor job prospects and basically use uni as an opportunity to party for 3 years and then end up in lower paid work will potentially never even reach the threshold to start paying back, so the loan amount & interest rate is completely irrelevant.
It seems a better option might be simply for parents to remortgage and provide the "loan" themselves, giving a far better rate!