Try to look at it this way. Say for any individual flight the risk of successful take-off, flight and landing is 99.999999%. That means that the overwhelming amount of the time, everything goes according to plan. But the risk is always there. We can't eliminate risk in something as inherently dangerous as packing dozens or hundreds of people into a flimsy contraption rammed full of highly flammable fuel.
Planes are not designed purely for maximum safety. They are designed to be an acceptable compromise of various factors. Safety is a high one, but reliablity, weight and cost-effectiveness are others. A standard plane could be made much safer but would not be cost-effective, it would be so expensive nobody could afford to use one.
Procedures could be put in place to prevent an aircraft coming within 10 miles of another aircraft. Airports could be designed to be 100 miles away from any form of settlement, and be limited to one flight in or out per day. Things could be made much safer, but make flying uneconomical.
The real driver is cost. Flying has to be profitable. Safety is an afterthought of this, it's required to be of a standard that doesn't make people too afraid to pay to fly, but it's a secondary concern.
Everything we do in life is a risk and cannot be completely safe. Getting out of bed in the morning has an inherent risk, as does not getting out of bed.
Comments about crashes like this one being inevitable should not be seen as anything other than stating the facts. If there's a chance something can happen, given enough opportunities to happen eventually it will.
There was an article a while ago that "debunked" the idea that an infinite number of monkeys sat at typewriters would, given an infinite amount of time, type out the works of Shakespeare. The claim that this was untrue was based on the fact that monkeys would cease to exist in evolutionary terms before they had achieved the feat. That misses the point though, because the "theory" was all about an infinite amount of resource. Clearly this infinite resource is impossible, just as it is with plane journeys - there is only a finite number that the planet could support. But the basic principle is sound. Given enough resources, something that can happen, will happen.