

I suspect the person you responded to understood the context, but was cheekily calling out the “technically incorrect” usage of ±
The ± symbol requires a tolerance value to create a defined maximum and minimum range, e.g 300±20 (so Soran could be anything between 280 and 320)
it doesn’t mean “approximately”
But I understand this is just an inconsequential funny picture, so whatever right.
Well, that part at least I don’t think is necessary. It’s a parody of a dating app, and it seems from searching screenshots the real app doesn’t have units either - just the number.
Which is just fine, because the number next to someone’s name being their age is clear from context.