Youtuber Convincemeaudio once said that a full digital pre-amp can, on rare occasions, make a (digital) fluke and output full volume. He therefore likes a 'real' pre-amp to master the volume before a power amp.
Only once I had this happening on TT2, headphones got suddenly full volume after a startup of TT2 IIRC, restart and all okay, never happened again.
If that happens on a power amp you gonna jump even more and blow something if the odds are against you.
So chances are veeeery small, but it can, so I understand that youtubers position.
Most safe volume control is like a hardware
Goldpoint thingy, that's never gonna fluke you and is 100% signal respecting.
I run a Rebelamp (in high gain) after TT2 with its own rebelamp volume control knob, but that one keeps fixed at say 10 o'clock and I use the TT2 in AMP mode (low gain) so I have still a Chord remote control working for volume. With TT2 in DAC mode I would have to turn rebelamp volume knob manually always.