Try reading it for yourself, the feds are limited to promoting the sciences and useful arts by providing patents and copyright only. It's very straight forward sentence, even you should be able to understand it. That is the ONLY ENUMERATED POWER on the subject.
Well, this is the sentence, which you claim "explicitly prohibits funding" .
'To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries;'
If you are smart, you will admit that you got this wrong and apologise. If you are stupid, you'll descend into a tantrum.
To promote, by securing, what about that do you not understand? Where is any doubt or wiggle room there? Come on genius, educate me.