Well, exactly this. Clarifying that ransom payments are tax-deductible creates a moral hazard whereby companies set up off-shore entities to conduct ransomware attacks. The parent company gets attacked, establishes a paper trail of "damages" (whether these damages are material is irrelevant, particularly as the stock market has shown that it won't punish companies for being the victim of cyberattacks), quickly pays the ransom, which moves the money off-shore into crypto accounts which can then be tumblered and funneled into shell companies. The off-shore cash can then be used off-the-books for a variety of purposes that indirectly benefit the parent company.

Good luck to the forensic auditors who try to follow the trail to show that the money never really left the parent company's control.