The author uses some of his own first sentence quoting Mark Twain.
The federal government doesn't tax assets (property taxes, car taxes, etc. are state and local). It taxes income. So the fact that some billionaires -- a measure of assets, not income -- pay a lower tax rate on income than others is irrelevant to the assertion that they pay a bigger percentage of the dollars collected in federal income tax.
The author (Bob Lord) didn't dispute any of the facts cited in the linked article. And he doesn't back up his claim that the 2020 data was, "cherry-picked." He just says that it appears to have been the case.
Turns out, not so much.
Here's another article, from a different source, showing the breakout for historical years. Starts out with 2020 -- same numbers as the link in my post above. But scroll down a bit over halfway through and it shows 2017, 2018, and 2019. 2020 is slightly higher. But the previous 3 years, all pre-pandemic, weren't much lower. At all.
The same chart also shows 1980, 1990, 2000, and 2010. Note how the percentage of federal income tax receipts paid by the top 1% and top 5% has roughly doubled.
Who Pays Income Taxes? - Foundation - National Taxpayers Union (ntu.org)
Then Lord drags state and local taxes and income inequality (which he conveniently doesn't define) into his attempt to discredit an article that doesn't even pretend to address either.
The article I linked in my original post, and the article linked in this one, describe what actually is and has been in recent years.
Bob Lord doesn't like the current setup and is arguing what he thinks it should be.
Lies, damned lies and statistics indeed.