I think it is also not true that there's only one correct answer, although I don't know how valuable this is.

For committing let's say yes, only one correct answer. Say the tool doesn't let you commit after you've merged without resolving conflicts.

But continuing to work locally you may want to put off resolving the conflict temporarily. Like person A changed the support email to help@example.com and person B changed it to support@example.com - obviously some wires go crossed and I will have to talk to A or B before committing the merge and pushing, but I can also go ahead and test the rest of the merge just fine.

And heck, maybe even committing after merging is fine but pushing requires resolving. Then I can continue working and committing locally on whatever else I was working on, and I'll only resolve it if I need to push. Which may mean I never need to resolve it, because A or B resolve it and push first.