This isn't true.
Per Statista.com:
According to exit polling in the 2020 Presidential Election in the United States, 55% of surveyed college graduate voters reported voting for former Vice President Joe Biden, while 49% of voters without a college degree reported voting for incumbent President Donald Trump.
College Graduate
Joe Biden 55%
Donald Trump 42%
No College Degree
Joe Biden 49%
Donald Trump 49%
* Donald Trump's largest demographic is comprised of white men without a college degree, who are over 40.
Now show us the Statista income brackets for 2020. See?
Republican voters have fewer degrees, it doesn't mean they are 'uneducated' or unintelligent, they simply didn't go to college. Instead, they have higher incomes because they chose occupations of greater utility, skills that are in demand. Repub voters are also less likely to utilize welfare/subsidy, and be economic drains.
We could use a lot more people like that regardless of how they vote.