Look at it this way; your $46 of "pure" profit subsidizes the helmets that go to police groups, charities, etc.

Since helmets are mostly optional items, they are sold at what the market will bear. If nobody bought $150 helmets, there would soon be no $150 helmets on the market.

That helmet shown above looks like something from the 70's; I wouldn't be a bit surprised if the company got a hold on the old molds from a 70's design and is using them till they break to make those helmets. They look heavy, hot, and the shell on the outside is probably barely glued on. Fit is probably not so good but good enough.

Profit is not a bad thing; it brings new companies into a market, which drives competition and lowers costs. Profit drives innovation, and innovation leads to better designs at lower costs.