You are right, it's not worth talking about when you maintain that low volume can lead to high prices as much as high volume can lead to low prices, when at the same time offering that high volume can lead to high prices as much as low volume can lead to low prices.

Meanwhile I will continue to insist that, in my opinion, prices changes without volume are meaningly.  Having said that I will add, "...unless shown to be persistent over time."  But by the, it's obvious to all anyway.

In other words, and without news, the happenings to the share price within a single day are meaningless without volume.  Even with a sudden change in volume, there may be no value interpreted from that without persisently higher volume.

VP