Not everyone lives in CA. There's different types of taxes and deductions. Of course, there's different taxes and the change in SALT deduction has affected higher income individuals in higher tax jurisdictions. If you're a business owner, everything is expensible. If you were to take no deductions and think it is your duty to pay as much tax as possible, then yes, your marginal tax rate will be 40-50%. There's so many vehicles and structures out there that affect your AGI that almost no one pays that hypothetical 40-50% of your net income.
So, if you were to blindly pay taxes, then yes, you are correct. However, most people are smarter than that, in that they will take as many deductions as possible to drive their taxes down. There's a fine line between legal tax avoidance strategy and tax evasion. That's something we tread along carefully.