Question Motors specs

Hi all.
I'm starting planning a motion system for my rig, but I'm a little bit puzzled about the motors specs.
The project I'm following (is a third part project for a motion seat, not a platform) uses 3 motors with these specs:

• Rated Power: > 350W
  
• Voltage: 24V
  
• Rated Current: < 30A
  
• Gear output speed: ~ 150 rpm
  
• Gear torque: > 20 Nm

This is referred to a commercial worm motor; but as it will be possible to choose other motors, I'm keeping finding people using normal weelchair motors.
Looking for the specs of weelchair motors, I find always torque like 0.2-0.4 Nm, meaning 1/10 of the gear torque of the above specs.
Beside the other specs (power, etc), it seems to me really weird this difference (20 to 0.2 Nm), it's really too much....
So I'm wondering: what could be the problems of using so low torque motors? Or is it really enough a torque of 0.2 (meaning " bro, 20Nm is really huge - and not necessary...")?
Thanks

I think the main question is where they are measuring the torque. Regular DC electric motors tend to actually be pretty low torque, like that 0.2 Nm you are seeing. However, that's what the gearbox is for as it will multiply the torque at the cost of rpm. So a 10:1 gearbox on your 0.2 Nm motor would get you 2 Nm, but at 1/10 the rpm. Looking at the speeds and torque of the original motor listed, those appear to be at the output of the gearbox, not the motor itself.