True but it’s not like Bayern knew when Robben got injured. Am sure he has gotten injured before and then missed key games in the Champions League for example but that did not stop Bayern from keeping him. In the Premier League, an example would be Aguero, who has had his fair share of injury problems over the years. Sure, you might again argue that City have probably been the most dominant side in recent years and have a squad to cope but we are also looking to build a squad as strong as City, no?
I know his injury record overall doesn’t look great but just in terms of his time here, he only really was out earlier this year. Admittedly, it was like 2 months but it was still only one period in the entire season. As long as his training workload is managed properly as well as his game time, he should be fine.