Confused - I disabled sa account for security reasons - My sql agent jobs owned by sa now fail

All the articles over the years tell me that disabling sa wont affect any jobs owned and run by sa. I'm running the SSMS builtin Maint wizard job: "Misc Cleanup.Subplan_1" and "DB Integrity Check.Subplan_1" and also a Ola Hallengren "Index Optimize and stats" job. All of them fail since I disabled the sa account. If I re-enable sa the jobs all work. Message:\ >Executed as user: NT Service\SQLSERVERAGENT. \ \ Microsoft (R) SQL Server Execute Package Utility Version 15.0.4420.2 for 64-bit Copyright (C) 2019 Microsoft. All rights reserved. \ \ Started: 11:08:30 AM Error: 2025-03-17 11:08:30.84 Code: 0xC00291EC Source: {D9910D3F-29BA-4AFB-9499-EB09B2E4F937} Execute SQL Task Description: Failed to acquire connection "Local server connection". Connection may not be configured correctly or you may not have the right permissions on this connection. End Error\ \ Warning: 2025-03-17 11:08:30.84 Code: 0x80019002 Source: OnPreExecute Description: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (1) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors. End Warning\ \ Error: 2025-03-17 11:08:30.86 Code: 0xC0024104 Source: History Cleanup Task Description: The Execute method on the task returned error code 0x80131904 (Login failed for user 'sa'. Reason: The account is disabled.). The Execute method must succeed, and indicate the result using an "out" parameter. End Error \ \ Warning: 2025-03-17 11:08:30.86 Code: 0x80019002 Source: Subplan_1 Description: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors. End Warning \ \ Error: 2025-03-17 11:08:30.86 Code: 0xC0024104 Source: {229E238E-F0DA-453A-AB7A-027524E534C9} Description: The Execute method on the task returned error code 0x80131904 (Login failed for user 'sa'. Reason: The account is disabled.). The Execute method must succeed, and indicate the result using an "out" parameter. End Error\ \ Warning: 2025-03-17 11:08:30.86 Code: 0x80019002 Source: OnPostExecute Description: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors. End Warning \ \ DTExec: The package execution returned DTSER_FAILURE (1). \ \ Started: 11:08:30 AM Finished: 11:08:30 AM Elapsed: 0.422 seconds. The package execution failed. The step failed.