I understand the distinction you're making, but in this case we're talking about the top 1% of wealthiest people. From the article:
The most comprehensive study of global climate inequality ever undertaken shows that this elite group, made up of 77 million people including billionaires, millionaires and those paid more than US$140,000 (£112,500) a year, accounted for 16% of all CO2 emissions in 2019
Also, the phrase "the top 10% of wealth" doesn't really make any sense. How can wealth itself have percentiles? A percentile shows the percentage of scores that a particular score surpassed. So, the wealthiest 10% means people whose wealth is higher than 90% of other people. What would the top 10% of wealth be?
I think the point you're trying to make is that the top 0.01% are much, much wealthier than the typical person in the top 1%, and probably one individual in that top 0.01% probably contributes as much CO2 as hundreds or thousands of people who are merely in the top 1%. And, I fully agree. But, this article has put the cutoff at the top 1%, which includes both Elon Musk, Jeff Bezos, Bill Gates but also your dentist, the guy who owns the Chevy dealership, and the woman who manages the HR department.
Two things can be true. In this case, it's that the ultra-wealthy with private jets, multiple houses, etc. live lifestyles that put out vast amounts of CO2. But, also, a fairly average American lifestyle is also very CO2 intensive, compared to how a poor person in India or Cameroon lives.