If any coin is to succeed in the long term it needs to be tested for safety and resilience. Trial by fire so to speak. So I'm actually glad that people are performing attacks, it's the only way to find out if the technology stands to survive or not on a larger scale.
Agree with this, human attacks to a certain technology could somehow a good move though in order to test a particular thing if it would survive for long . In the case of ETH i could somehow say that its quite a good coin for me inspite of all issues regarding into it into the past months and years.