Are all hooks/functions tied to Kses meant for sanitization?

… anything I find in core with either kses in the code or the PHP
comments has to do with data sanitization?

It would have to do with the functions that sanitize data or with data that needs to be sanitized, yes. That is the primary reason for the KSES code, which, if you look it over, is pretty resource intensive. You wouldn’t want to use it unnecessarily.

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