Those are not costs associated with your job, that’s why you can’t deduct them.

They are associated with my job because if I don’t have them I can’t do my job.

A business gets to deduct “all” its costs because all the costs are associated with the business.

See above. If I don’t eat I can’t do my job.

Yes, that’s how examples work. Do you think the numbers are “wrong”?

I think your example is silly. There is no reason we can’t have the exact same tax structure for businesses as we do for individuals. We could set up tiers etc. If people somehow are able to stay alive despite being taxed on revenue and having no relief whatsoever for their living costs so can businesses.

Answer my questions from my example. Last chance then you’re blocked as you’re clearly not capable of intelligent debate.

Oh my god. Some rando on the internet on a web site ten people use is going to block me because I don’t buy into his ideology. Whatever shall I do? I will be so despondent!

I answered your question multiple times. It’s just that your zealotry and inability to think outside the box causes you to reject the answer.