Torque settings are a must.
Anyone who thinks the can get away without using a tension wrench is playing with fire.
Overtightening a fastener can cause it to break, stretch or tear out threads.
Under tightening can cause seals to leak, components to warp and fastenings to loosen and back out.
I have made thousands of dollars fixing stuff ups caused by backyarders thinking that they are better than a tension wrench.