That isnt exactly true. With hard work and motivation, people can do it. A musician friend of mine who left school before A levels, eventually did her A levels at evening classes, then did a degree and doctorate at Oxbridge. One of our daughter's school friends went to uni with Arts subject A levels, but after graduation decided she wanted to be a doctor, so took Biology and Chemistry science A levels to qualify for the medical school.
Don’t get me wrong, it’s definitely possible if you want it enough! I do think that it is generally “easier” to go straight into a levels however due to a lot of content relying on GCSE’s…obviously subject dependent but I did chem, bio and geography and not only used gcse knowledge from those subjects but also maths, history etc. it definitely would have been possible to from them after some time away from education but I think Id have found it more difficult. University on the other hand does obviously use a level content/ knowledge but for many courses people come from different backgrounds/ with different a levels so for a lot of the first time it’s all taught or retaught to you anyway! Do agree 100% it can be done, just think it would be a lot easier getting them done straight after GCSEs
