This is an interesting thread you've started, RoosterJerry. It's brought out a lot of well-reasoned responses that I wouldn't have guessed at...and some others not in that category, but I won't go there!
I think I understand your question, being really in two parts:
1. " Why go so far beyond a chicken's needs?" which many have answered well.
2. "Is there not a better use for the money, if one has it?" Perhaps you are thinking charity, or perhaps you are thinking of one's personal financial stewardship.
As far as the charity goes: some have given good answers, and others--well, you can't will people to change their viewpoints.
I do not envy being broke, but I value the resourcefulness it fosters and the creativity it engenders. You have happy hens and wholesome produce, and the opportunity to sell it. You're not likely to get rich from that, but the position you are in right now is a form of wealth in its own weird way. Your own resources and values are your best tools to success and independence.
As far as financial stewardship goes, I'm of the opinion that simply spending more money on something does not give it greater value. I'm not rolling in cash, so I try to reserve money for where it is needed, and use resourcefulness and creativity as far as they will take me--including building a chicken coop.
My coop-to-be was a saggy old shed full of junk that I emptied out. The junk is building materials that I have salvaged from demolitions, and I am using it to reconstruct the shed. The roof is re-used metal roofing, probably its third life. I had to buy more nails because I happen to have run low; and the hardware cloth wasn't cheap, but given the local predators, I consider it an investment in the chickens' safety. (What would be the point of having chickens if I didn't provide adequate protection?) With the fasteners, mesh, insulation, and building paper advised in my climate--or I would have dispensed with it--and the brooder bulb, I've probably got $150 invested in the coop, the run, and the brooder together. It's far more than I thought it would cost, though I could have bought the materials more cheaply if I'd spent more than the difference in gasoline!
Ah well. The coop is a one-time capital cost in a venture that will doubtless repay handsomely: if not in money (just hoping to break even), then in learning, health, neighbourliness, independence, and inspiration.