Yes, because actual scientists have no ideological motivations.
Of course individuals have ideological positions. Scientists are no exception. That is why the methods of modern science, which is to say publication of results under strict conditions of peer review, replication, exposure to critical scrutiny --and there can scarcely be any field of science in history exposed to a greater degree of critical scrutiny --are designed to eliminate the personality of scientists from science. The Cato Institute OTOH is explicitly and unapologetically an ideologically motivated think tank (which is fine). What distinguishes their methods is that they are designed to produce a result which accords with that ideological position. Again we should expect no less of a lobby group.
Now if their critique had any scientific merit (as opposed to the rhetorical merit it no doubt possesses, after all you yourself have been taken in), it should have appeared in the actual scientific literature. It hasn't and thus forms no part of the scientific debate.
You need to learn to exercise some scepticism. And that starts with a rational assessment of your sources. Really if you were interested in the science of climate, what possible failure of intellect would lead you read anything from the Cato Institute?! [I'm being disingenuous here, I know the failure of intellect that leads into that error: tribalism. I even had some dickhead American liberal presume I was one because I don't deny science just last week. As though that should even be relevant.]
And science is defined by the majority of other scientists.
The science is defined by the ensemble of published papers in the literature.
We can't start letting statisticians and people who understand math start analyzing science!
You can not seriously believe there is no maths or statistics in climate science?! Wow. In fact some climate scientists, most notably perhaps Gavin Schmidt were mathematicians first and became climate scientists because of the overwhelming demand for mathematical expertise in that field. If you think the sum of stats and maths smarts at the Cato Institute approaches anything near that to be found in the climate science community you need institutionalisation. Srsly!
And if you take your science from ideological think tanks, (who don't even make any secret that they are) rather than from the bona fide science literature it is little wonder that you are so wildly disinformed. Don't be a sucker your entire life.