The president’s plane (if you mean the US president,) is a normal airliner. A Boeing 747–200 in fact.
In terms of safety systems or design or construction there is nothing special about it. It is just maintained and used very carefully.
Airliners are incredibly safe. In 2015, 3.2 Billion people flew and there were no major airline accidents and no resulting fatalities.
By comparison, 1.2 million people were killed on the world’s roads…
Flying is safer that eating, walking, swimming, talking a shower, giving birth, riding a bike and just about anything else humans do.
Aircraft manufacturers and airlines are extremely conscious of safety . Yes, they have to be careful with money, but every company I have ever worked with understands how costly an accident is. Having an accident has put more than one airline out of business. It may be a cliche but it has been said “If you think safety is expensive, try having an accident”.
It is also safe to say there are some companies that try to cut corners on safety. Generally those companies don’t last long. They are often shut down by the regulators charged with overseeing them, or simply don’t have a financial model that allows them to keep going. Whether that is a factor in the crash you have mentioned will come out in the investigation.
As to the President’s plane, there is nothing special in its construction that makes it inherently safer. It is maintained and operated in a way that would not be practical for an airline. For example, no airline is going to get the sort of protected airspace or priority handling that surrounds Air Force 1.
And let’s ask you the economic question. You need to take a trip. There are two airlines. One is a major carrier, overseen by a very good national regulator, and with an excellent safety record. The other is an airline that also has an excellent safety record and promises that their airplanes are maintained to the same standards as the aircraft used as Air Force 1. You compare the ticket prices and the first is $500. The second is $2000. Which one do you buy?
BTW, building an airplane that could withstand impacts would make it completely safe indeed, but only because it would be too heavy to fly. Any airplane can be completely 100% safe, as long as you never fly it, or use it for any other purpose.