Well riddle me this, if a computer of any sort has to constantly keep correcting itself, whether in processing or memory, well doesn’t that seem unreliable to you?
Error correction is the study of the mathematical techniques that let you make something reliable out of something unreliable. Much of classical computing heavily relies on error correction. You even pointed out error correction applied in your classical computer.
That sort of RAM ain’t exactly cheap either, but it’s way cheaper than a super expensive quantum computer with still unreliable memory.
The reason so much money is being invested in the development of quantum computers is mathematical work that suggests a sufficiently big enough quantum computer will be able to solve useful problems in an hour that would take the worlds biggest classical computer thousands of years to solve.
lol.
All of modern technology boils down to math. Curing diseases, building our buildings, roads, cars, even how we do farming these days is all heavily driven by science and math.
Sure, some of modern technology has made people lazy or had other negative impacts, but it’s not a serious argument to say continuing math and science research in general is worthless.
Specifically relating to quantum computing, the first real problems to be solved by quantum computers are likely to be chemistry simulations which can have impact in discovering new medicines or new industrial processes.