(1) I think people assume that just because bitcoin exists banks will vanish. Bitcoin is the protocol that banks can use, but individuals as well. Also, micropayments on Bitcoin exist today. I encourage you to download a lightning network wallet (e.g. Breez Wallet: non-custodial and open source) and send me a "lightning-invoice" I can pay you in the sub-cent range.

(2) It requires real world resources to be spend and uses the most globally available resource, energy. I see it as a feature not a bug.

Renewable energy is the cheapest though[0] and thus the one that competitive miners need to use. Non-competitive miners get driven out very fast thanks to the difficulty adjustment.

Any percentage of optimization you can get in your energy production you can use to outperform other miners, thus get more of the block subsidy and drive out inefficient miners.

Bitcoin mining de-risks investments in energy producing facilities. You always have a buyer for your energy, which is a problem especially in renewables. [1]

[0] https://en.wikipedia.org/wiki/Cost_of_electricity_by_source [1] https://www.sciencedirect.com/science/article/abs/pii/S13640...