I get a QNH from French & German info services all the time on first contact (VFR), just after I’ve told them my current FL, which is usually very obviously above transition level. I used to repeat my flight level, thinking they missed it, but now I just read back the QNH and don’t sweat the small stuff.
Many pilots in aircraft with two altimeters set the second to QNH for terrain clearance and only set the primary to 1013. This is especially useful when flying IFR, where the primary is typically set to 1013 as soon as cleared to a FL, which can happen very low.
So some like to have the QNH available at any altitude.