You stand next to a jet, it's going to be too loud, too, Gary! But that don't stop it being the best at getting you from one side of the country to the other if you are in a hurry!
I've worked with some drummers that can propel you like a freight train, and I have to turn down to hear them! The only reason you would put up with a too loud drummer is that one at the right volume won't play with you! But they do exist! Primarily, though, the volume that they play at has got NOTHING to do with the sound. You can turn an S950 up to stadium levels, it won't sound as punchy as a Korg or Roland, and it doesn't sound as dynamic. It's in the samples themselves, not the volume.
And Gary, NO-ONE here has played a T5. But apparently, that hasn't stopped you from agreeing with them or trusting their opinion if it is positive. The double standard being displayed is quite obvious, mate.
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An arranger is just a tool. What matters is what you build with it..!