This is certainly true for hyper-deflation. It is not true for moderate deflation.

One example is the deflation we currently have on computer-based products. The argument that people do not spend their money in a deflation, because the money will be worth more in the future, is simply not true. If people thought that way, they would never buy a computer or a mobile phone, but they do.

Add to that the fact that human life is of limited length, so humans have to spend their money before they die. You cannot always wait for tomorrow.

I still think that the deflationary tendency of bitcoin is damaging, for example because it creates speculative price bubbles. I wish that Satoshi Nakamoto had thought of that and dropped the idea of halving production every four years. I believe bitcoin would have worked better without any halving.