I think it matters more than anyone really thinks. It's a similar line of reasoning to anything where the sum of a distributed set of parts equals a greater whole. For example, if everyone on Steem burned 1% of all their STEEM earnings, it would have a profound impact on the total amount of STEEM burned each year.
That's an interesting thought. That would be a cool initiative to try and set up. Maybe a once a year festival type thing. A steem version of burning man! I have a personal life example of that type of collective thinking effecting price. Maybe I'll post about it on @steem.leo