To claim that well established economics theory is bullshit require strong evidence, but your example failed to supply the evidence for disproving the theory. If you have studied economics, you must have known the concept of elasticity of demand. To highlight the fault
in your example, replace the word "electronics" with the word "food ". Certainly, even if everyone know the price of food would become lower one month later, no one can refuse to buy food for one month, since no one can stop eating for one month. This example only shows that the demand of food is mostly inelastic, and your original example only shows that demand of electronics is relatively inelastic. Very few people in developed nations can accept not carrying a mobile phone or not watching TV for a month or longer. But many goods and services in the economy have higher demand elasticity, so the effect of delaying purchase and holding on to the money is very real if there is an expectation of decrease in price.
Your opinion about who can benefit from inflation and who can benefit from deflation is also highly inaccurate. The use of the word "profligate" is especially misleading. The fact is, inflation benefits all borrowers, regardless of whether they borrow the money for building roads or for buying luxury. On the other hand, savers are not the group of people most benefited by deflation. Deflation is most beneficial to people who already have a lot of money, that is, the rich and the wealthy.
Your belief that central bankers want to "rob" people by diluting money is completely groundless, and this view sound like those flavoured by conspiracy theorists. History has shown that no central bank in modern industrial nations want to have high rate of inflation, and policies are enacted to control inflation rate if it becomes too high. Central banks prefer a small inflation rate because according to mainsteam economics theory, a small inflation rate facilitate lending and borrowing, which in turns encourage economics development. In rare histroical cases where there was a very high rate or hyperinflation, for example in Germany during early 1930s, the hyperinflation were always
caused by failure of political leadership, not by central bankers.