style: prefer nullThrows a bit more

[lishaduck]

PR Checklist

• Addresses an existing open issue: fixes #000
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Was looking over the #2315 diff and noticed a few more nullThrows-ables lying around.
I think these look better this way but I'm not tied to it, especially if it conflicts with #2316 (it doesn't, yet). ❤️‍🔥

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
flint	Ready	Preview, Comment	Mar 11, 2026 6:26pm

[changeset-bot]

⚠️ No Changeset found

Latest commit: 6f83362

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR