There are clear benefits. They just refuse to see them. You can show a mountain of evidence based on peer reviewed research and they'll hand waive it away and say "Private enterprise could do it better" or some nonsense.
The Trump GOP has no reflexive opposition to government. Trump won the nomination in 2016 because he abandoned the GOP orthodoxy on free markets and declared there would be no cuts to Medicare or Social Security benefits. https://www.vox.com/2015/8/15/9159117/donald-trump-moderate
Tariffs are government. Border security is government. Police are government. The Trump GOP supports all those things.
On the environment, Trump is an incrementalist. He’s not proposing on repealing the Clean Air Act or Clean Water Act. But in the 50-60 years since those laws, we have adopted numerous rules and regulations that don’t provide the same level of benefit. In his first term, he was focused on rolling back those regulations.
This is not a president that’s afraid of blowing things up. If he wanted to defund the EPA he would.
Because they don't believe that most of those laws are having meaningful benefits. The law of diminishing returns applies to everything, including ever-increasing regulations.