It's only numbingly stupid if you can't comprehend the power a manager has over a team, who knows what shape their players are in, and how fit they are, or if they should really take the risk of playing them considering the importance of a knockout Euros. KDB saying yes is only part the problem.No matter how many times people repeat this mind-numbingly stupid accusation, it won't make it true.
The only people involved in the decision are Kevin De Bruyne and the doctor who is required to warn him of the consequences of his decision. It was De Bruyne's choice, and he's paid the consequences for that choice.
How many hundreds of players need to prioritise a chance at a trophy over long term injury risk before people just accept that players are always going to do this? It's a short career anyway and you might well never be 2 games from winning the European Championships again.