re-sitting A levels while at uni

[Voyager2019]

Hello, knowledgeable MN. I have an odd quiery and I wonder what everyone thinks about this.
My DC worked really hard, but missed out by a few marks on 2 of the A levels and got Bs despite A* predictions. Managed to get into the insurance uni for the right course and is intending on starting this September. DC is very unhappy with the Alevel results and wants to re-sit them while at uni, so the B grades do not hinder future applications for postgrad and jobs. DC is aiming very high and feels that these grades are not representative to their knowledge and efforts. Do people think this is possible and is it necessary? Are A levels really that important for the future opportunities? TIA

A first at degree level (or a 2/1) is worth more than a higher A level.

The people who get first (generally) put a lot of effort in throughout the course. If your child is concentrating on re-taking A levels, it is unlikely they will put enough effort into their degree course. An exception to this might be a linear course such as maths, or straight economics etc. Where the A levels to be re-sat are the same as the degree.
When I’m recruiting, I look at the degree before A levels.

On a practical note, what happens if the exam dates for the A levels clash with exam dates at University? It’s just not a realistic option

VanCleefArpels - that is exactly what I thought too. It is not realistic. I think DC should look forward now and try and do as best as possible at uni. Perhaps the Alevels are not as important as they seem right now. Quite frankly, we just want to put it behind now and move on.
Thank you all for your advice! It is really appreciated.