I wonder why I can never reply to any of the polls. I always see the poll with the votes, but I never get to answer

I've always assumed it is due to newbie status. I think higher 'ranked' status folks get to vote. Limits polls from alts and such.
The science of physics is an attempt to understand
All of Reality, which is generally considered to be an even larger set of phenomena than your description of economics

Are you suggesting that since we can never
really understand All of Reality, that no 'hard science' of physics can exist, and that such a purported 'hard science' of physics can't have any predictive power or utility?
Physics does not want to understand all the universe. It only wants to understands how its parts work, and generally limits itself to the smallest and simplest parts.
Phisicists may study the behavior of isolated atoms of generic bonds between atoms, but if you ask them to predict what a dozen atoms will do when they get together, they will tell you "sorry that's Chemistry, not Phisics". Ditto if you want to predict tomorrow's weather, create a better strain of wheat, cook a good meal, pick up a girl at the bar...
And even the simplest "economic atoms" are already way more complicated than a tropical storm...
You may want to ask an Astronomer which department they belong to. Think that's not complex?
Lose vs Loose
A lot of people are mixing up lose and loose. In particular, a lot of people are writing loose when they really mean lose. Here are the definitions of the two words from my Penguin dictionary:
loose [lOOs] adj not fastened or pre-packed; not tied up or confined; able to move freely; not tight, not firmly fixed; not close-fitting; careless, inaccurate, vague; dissolute, immoral; not closely woven; flabby; (of bowels) inclined to diarrhoea; l. box stable or van in which an animal can move about; at a l. end uncertain what to do next; unoccupied ~ loose adv in a loose way; play fast and l. behave rashly or unscupulously ~ loose n release; on the l. free from restraint; on a spree; ~ loose v/t untie, undo; release from confinement or constraint, set free; detatch; fire (gun); shoot (arrow); (eccles) absolve.
lose (p/t and p/part lost) [lOOz] v/t and i no longer have; be deprived of by accident or misfortune; mislay, fail to find; fail to get or win; be too late for; be bereaved of; waste; be defeated or beaten; suffer loss, become worse off; fail to hear, see or understand; cause or allow to perish; (of clock or watch) go too slowly; (refl) miss the right path; become absorbed in; l. one's head become flustered, panic; l. one's temper grow angry; l. one's way fail to find the right path; l. out (US) be defeated after a struggle.
Examples:
This knot is too loose.
Please do not lose my book.
I had better not lose that file.
many BTC owners are facing the prospect of selling their BTC for a loss

/*that's the joke meme*/
*snip
I guess we will
Though they have been pulling the order at the end of the day, and then putting up the bid again in the a.m.
Seen that from some Fidelity investors who have their bids cancelled at the end of the trading day and have to re-do them in the am.