You're both correct... but I think what triaketige is referring to is that in the Airbus if you're climbing or descending in a mode that sets anything other than 'SPEED' mode (ie. THR CLMB or THR IDLE) pitching out of the FD bars can/will cause an over or underspeed.

I've seen it catch people with thousands of hrs in the plane off guard & confuse them. For example, climbing out & cleared to some altitude in the teens ATC requests a level off at say 5k for traffic. Pilot sets 5000" but the AP doesn't capture the altitude in time... PF snaps off the AP & pitches down out of the bars attempting to level at 5k. The Autothrust stays in 'THR CLMB' & airspeed increases.

The inverse scenario can be even worse. Pitch up out of the FD bars while descending with Autothrust in 'THR IDLE' & the airspeed will decay towards stall with only 'AFLOOR' protection (which commands & locks thrust at TOGA) keeping the stall from actually occurring. AFLOOR is not active below 100' RA though... which is supposedly why that Air France AB ended up flying into the trees.