Are you of the opinion that the European recommendation is insufficient? Would you petition European healthcare industry that they are requiring too few vaccines? If so, I would expect Europeans to be chronically far more diseased than Americans, do we see that in the data?
One of the vaccines made strictly optional was for dengue, which is not really a thing in denmark since I think they don't have that many mosquitos due to weather.
However, in the US, mosquitos and tropical weather are common for a large part of the population.
Point being, a huge country with a huge variety of climates and diseases shouldn't follow the lead of a small country with a fairly homogenous weather and disease pattern.