The context is making pricing more opaque than it needs to be in order to earn more money.

I don’t understand how it could be made simpler, unless you want every flight to cost the same, which is stupid. Hence the complaint does not make sense.

"We can't tell you the exact price because you haven't told us what you want to buy yet" isn't opaque or complicated.

Kind of? The way flights are sold and priced is opaque and complicated IMO. That doesn't make it bad necessarily: maybe there's no good alternative, I don't know. But it really is opaque and it really is complicated. I think my opinion is at least somewhat educated, having done some crude flight price modeling for work in the past.