As far as I understand, the 4 Mb block size will in the future always be fully utilized with whatever is humanly possible on BTC. It's futile to argue moralistically here. Ordinals, runes, NFTs ... whatever humans find useful will be inscribed on that block space. Precisely because it's the most secure and trusted chain/network in the world.

I'd say, it's better to focus on making data transfer speeds faster and ssd space cheaper over time to match the growing demand of BTC block space, so that node decentralization remains high.