I don’t see why one would not respond to the census.
I know some here have sometimes said they got a “long form” which asked intrusive questions. And some had objections to answering such questions.
The form I got was very short and asked simply for names of people living here.
I have no objection to that. It’s in the constitution that a census will be taken for apportionment purposes. Answer the basic questions only if you have gotten a “long form” which asks for private information unrelated to the enumeration needed for congressional apportionment.
If you live in a blue state, and you fill it out, you’re one more number to help that state get more representation and money.