So you use one that increases threats to human life. And can sometimes compromise better protection already inside appliances.i only use those with surge protection
Best power strip always has that essential circuit breaker. If it has protector parts, then one must properly earth a 'whole house' protector so that a power strip does not create human safety issues.
Effective protection means one knows where hundreds of thousands of joules are harmlessly absorbed. Power strips will not discuss it.
Surges are typically 100,000 Hz. That 50/60 Hz number is irrelevant.