Untracked time off is a double-edged sword for sure. I just make sure to take more time off than I would have gotten at my last job, and I tell my employees to do the same.
There need to be cultural norms set from the top around its use for sure. Though I'm not sure, in general, it's worse than pooled vacation/sick time.
I would hope that coming out of the pandemic there would be some rethink of a system that basically provides a strong incentive to come into the office sick. (OTOH, there may be more flexibility in terms of WFH so that may do the job at least partway on its own.)