I'm struggling to think of a reason why you would want it to link to your phone via Bluetooth when it doesn't do data logging
How do you have 10,000 posts and can't think of why they would add Bluetooth to a non-logging meter? LOL
1) HELLO.... REMOTE VIEWING!!!
There's been multiple times when I was in a challenging situation when I would have loved to have this feature.
2) Training / Presentations
You can run Blue Stacks on your laptop to run Android apps on your computer. Or do a screen project to laptop from your phone. Then you can share via a projector , Zoom, or other methods. Not too mention it looks nicer if you are teaching, doing a presentation, blog, or YouTube video.
3) You can take a screenshot to record your measurement and then write notes over top of the photo. I tend to lose my handwritten notes, so something like this would be handy for me.
4. Hard to read situations.
If your are trying to measure something difficult where it requires you to keep your eyes on what you are doing, you can do a screen record mode, and play back the video to see what the reading was.
Hopefully you can see this isn't a "WTF" feature as you thought. There is many meters on the market like this, and it's actually a nice addition to the feature set. My grandpa hated computers, the internet, LCD screens and was just happy using his analog Simpson meter for everything. He was an electrical engineer who worked for NASA. So it's easy to get stuck in your ways even if you are incredibly intelligent. But if you aren't open to new technology you will be missing out on some cool things which could make your life easier.