More importantly, try arguing that it is morally correct that a hard-working laborer ought to fund a Webb telescope by non-optional taxes, when he sees no direct value in it. Why even 1 penny? Because his betters in a grant agency know better what to do with the fruits of his labor than he does?
It was disgusting to witness Biden take a victory lap for the Webb telescope. It wasn't his money nor engineering and scientific effort, that's for certain.
Please, no utilitarian defenses of funding basic research by taxes. We need a moral defense. I don't see it at all. You can only defend it if you think people are too stupid to know their own interests.