Having worked with European industrial equipment, safety standards are very robust over there as well.
While Lockout-Tagout is the only way to guarantee no energy when working on a piece of equipment, sometimes the job doesn't allow that. Troubleshooting a problem, or an adjustment / training procedure may require the equipment to run under power. Same with a material load / unload process by the operator.
Risks in some of these situations can be minimized: Safety rated light curtains may detect an operator and slow the speed, deadman switches / e-stops may be manned during the procedure to allow for an immediate stop if something isn't right. However no matter how good these planned safety procedures and systems are, someone will come up with a scenario that wasn't foreseen.
This isn't to say that it's an unfortunate accident that couldn't have been prevented... it probably could have been prevented. Either the worker wasn't following the rules, or there weren't proper rules for what the worker was trying to do.