No. It's not skill that make flames cost more.
More effects, more particles, longer lasting particles cost more TC. Everyone is subjected to that.
Skill in using settings to make them look nice adds service charge at forgers discretion. This is retailing.
Skill in using settings without incurring as much forge cost reduces the forgers cost. This can reduce the retail price and allow for extra service charge from forger.
Skill actually reduces price. I see plenty more flames that are done poorly, expensively, and are rather unimpressive.
Setting all flames to 70k is socialist. It's like setting all head texture art to 5k. No one would put the effort into making a good head when everyone can be just as bad and expect a share of the sales.