The combat in the training mission is some of the easiest in the game. As Drelthar says, they give you some pretty good gear while the opposing NPCs have trash. If anything it fools people into thinking TTKs are only twice what they should be and that foot combat might not be a tedious slog.
This was my first attempt (of course I did play a bit of the alpha before though):
Source: https://youtu.be/2QXSYYIzqMY?t=965
A few days of testing later, I took my brand new Maverick suit and laser carbine to a threat level 3 mission after having run that tutorial about a dozen times...and had to bug out when I realized I couldn't hurt anyone...I mean they couldn't hurt me, as evidenced by the fact that I was cornered and still casually walked past them and then ran off to my ship and flew away without them being able to stop me, but watching those shields and armor trickle down much more slowly than my own ammo was rather demoralizing. At this point I mostly just abuse the braindead AI and ammo boxes to kill higher rank NPCs with my current gear.
Also the training teaches you to switch your weapons
Laser for shields
Kinetic for armor
It doesn't do a very good job of this since the laser rifle in the tutorial does just fine on the armor you're faced with.
I was like, "oh, maybe they removed that idiotic weapon switching requirement". Nope, just a misleading tutorial.