IRS efforts to reduce identity theft are wasteful and ineffective.  The assumption is that a victim this year is more likely to be a victim next year, when the reality is that the hackers move on to someone else whose SSN and address they have found on the dark web.  Still, if taxpayers want to look forward to their annual communication of a PIN, it's a free country.  (Sort of.  Maybe ICE could send an annual letter confirming American citizenship.)  If people don't want to participate, and can get past the IRS busy signals, they can ask to be removed.  See Internal Revenue Manual:

25.23.2.6.2 (10-01-2024)
Manually Reversing TC 971 AC 501
In some instances, it may be necessary to manually reverse TC 971 AC 501. Reversal may be necessary because of any of the following reasons:
TPRQ - The taxpayer requests reversal. . . .

21.1.3.2.3, Required Taxpayer Authentication, and IRM 21.1.3.2.4, Additional Taxpayer Authentication,
. . .
If the taxpayer insists on removal of the identity theft indicator after you have explained the benefits, review the account to determine if the identity theft issue is open in another function. If there is an open identity theft case, refer the case to that function using your normal referral procedures. Do not take actions on identity theft cases being worked by another function.