This is "true" in that "you can pull up some statistics that 'prove' this", but it misses the major issues entirely.
Yes, technically Trump voters have a slightly higher income than some Clinton voters if you pull some census data and overlay that to voter data. But income alone is not a great way to measure wealth. Clinton voters earning Clinton voters Trump voters in $40k households here live almost exclusively in old suburban sprawl, with poor quality housing (they "make too much" to qualify for the benefits previously mentioned). These areas have little to no educational or business resources, no diversity of residents, and no usable public transit. Many have sick relatives or have children, driving their costs up. Much of the benefits of cities are entirely outside of their reach -- and will remain that way their entire life. After accounting for higher living expenses, these folks have less discretionary income.
In this way, Trump voters have higher income, but have lower wealth, than lower-income/higher-wealth Clinton voters. There is no dollar amount put on any of those mentioned benefits, it does not show up on an census income report, folks will never get to see this from their coastal office highrise. But that is a very real and valuable form of wealth, that some have but many don't.
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Someone will condescendingly summarize those stats as "Trump voters just feel poorer than Clinton ones", as if they are lying for fun or something. But there is an actual fact-based argument for Trump voters being real-world poorer than Clinton ones, despite having on-paper slightly higher average incomes.
Similarly, if these folks complain about jobs, someone will argue "the US-BLS shows unemployment is actually down, so your wrong". Ignoring how wage growth has been mostly flat, despite inflation. Ignoring the huge 50%+ cost-of-living increases in Housing, Education, and Medical expenses (even in places like Michigan). Ignoring how many people are significantly under-employed. Ignoring the massive over-inflation of job/education requirements for even just entry-level positions. Ignoring that most of these jobs are being created in high-COL markets that none of these people will ever be able to afford to participate in.
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I live in Michigan. I am not a Trump voter in any way, but I am surrounded by them and live in an environment that tends to create them. People aren't complaining for fun. This isn't entertainment. They are frustrated to hell and back. And while I don't agree with their vote to "trash the system", and I can at least understand why they feel the way they do, and why they feel this is the best-or-only way to lessen the pain.
If we want to solve this, fundamentally we have to take these problems seriously. Right now, I'm not seeing that. I'm seeing "fact checkers" trying to "prove" these problems are fake, or solved, or getting better, and telling people "your wrong" for mentioning them. Shouting census data at people who are struggling will not win you any support, and will not fix any of the real (factually-real) problems many are struggling with.