I linked to wikipedia to hopefully better explain what I mean by loss aversion. To me, it's the psychological underpinning for why people start with no and think no at first.

Humans may be hardwired to be loss averse due to asymmetric evolutionary pressure on gains and losses. For an organism operating close to the edge, the loss of a day's food could amount to death, while the gain of an extra days food could lead to increased comfort but (unless it could be costlessly stored) would not lead to a corresponding increase in life expectancy.

Some studies have suggested that losses are twice as powerful, psychologically, as gains

Basically, we want to maintain the status quo which involves saying "no" to just about every possible thing because most things represent a change in the current state of nature, even if it's just a new piece of information.

Anyway, that's my view on it. Thanks for letting me share my opinion.