These are valid points, however the risks exist in a pronounced way, but what are the risks? I think that the main thing of all is that one of the best players could be injured and cannot go to represent his team in the World Cup and this is something very sad, both for the player and for the team and this has happened in friendly matches and it affects an entire nation enormously, I have seen how this has happened to Colombia, Peru, with some of the best players they have, some if they manage to recover, others not, but I think that for this competition as well as for friendlies in Europe , the players who are stars should take care and not play in order not to run the risk of getting injured.
The risk of injury is always there, even in training. It is up to the technical team to better manage the players at their disposal, in order to avoid or minimize this type of problem.
UEFA's idea is for teams to start using more players, who are used less. In Europe there are more and more players, if they don't have opportunities, it can reduce interest and devalue the market. So, with the creation of more official proofs, it serves that these opportunities arise.
Of course, at first it seems strange, and there is still the mentality of always using the same players. But I believe that in the medium term, we are going to start to see greater rotation in the squads and that could increase the more exciting competition.