[bigbugbag]

why would there always be advertising? there wasn't any for about 400 000 years and we had it for a couple centuries ? a few milleniums at most.

[TeMPOraL]

As long as there is more than one product competing for the same application and a benefit for the vendor from getting their product picked, there will be a pressure to convince people to choose in a particular way, i.e. advertising.