The old "sports car/dump truck" problem: you can make a good sports car, you can make a good dump truck, but what you can't make is a good sports car that is also a good dump truck.
Things are more and more complicated (interacting, and also wide, dense, fast-moving...), and therefore unpredictability grows.
This is true for nearly everythoing, and war reflects it, as up to the Industrial Revolution things (strategy, tactics, weaponry...) evolved gradually. Nowadays nobody knows anymore how all this really works, therefore there is less and less way to predict (how/what/why/when/...) sufficiently accurately in order to prepare/act adequately (for example to equip soldiers).
Hence the need for "something which can cope with any situation".
Fun fact: this 'something' has to be complicated, adding up complication to the complicated global state of affairs, nurturing the very cause of the underlying challenge.
You can almost though. Make it out of titanium, give it gas turbine engines with an electric drive, put the thing on hydraulics so it can get lower to the ground, add electronic stability control to get artificial sports car feel, and some rocket thrusters on the top to keep it from tipping over in tight turns. Maybe you could make the tires out of some metamaterial so it can have slick tires for racing and deep treads for the construction site.
All of that is to say it can be done, but you're going to pay, and it might not be delivered on time.
