Normal and bad/negative aren’t mutually exclusive.

Feeling sad initially isn’t like anything to feel shameful for. I’m just saying a good way to cope with that sad feeling, which I consider negative because sadness feels bad thus impacts my emotional state in a negative way, is to recontextualize our framing of the events into one we can feel differently about

Yes, he is gone and that is a sad thing, losing someone cherished always will hurt, but he is also now at peace and won’t suffer the horrors of onsetting Alzheimer’s and dementia and in that thought I can assuage my sadness into acceptance.