Hi mnally, welcome to the forum
🙂 It sounds like his GP is one of the school who believes in the 'preventative' qualities of the medicines you mention. I was also put on statins and aspirin when diagnosed, but after researching (and also suffering side-effects from the statins) I decided I did not wish to take either. My cholesterol was similar to your husband's. The general target for people with diabetes is to have a cholesterol level of 4.0 or below, but my consultant is happy for mine to be mid-4s since my 'good' HDL cholesterol is good. I suspect this may also be the case for your husband, since you say he is fit and trains regularly, as exercise does help with this aspect - he should ask the GP for clarification about this.
If you wish to look further into cholesterol, it is worth having a read of
The Great Cholesterol Con. Reading this, coupled with the side-effects I was experiencing, plus the low statistical advantage to be gained from taking what is a very powerful drug, I concluded they were not for me. (If 100 people do not take statins then 6 of them may suffer cardio-vascular problems, and if 100 people take them then 3 of them may suffer CV problems - for the remainder it will make not difference).
Similarly for aspirin - there are risks associated with taking them regularly, so I decided I would decline.
This is just my own experience though, it is important to discuss it with yor doctor and be convinced (or otherwise) by them.