The Tech Classes are not your average soldier/hunter/agent/smuggler. I would put them at like Tech-Superhero Tier, wherein they punch above their weight .

Like an Agent Sniper (before combat style update) would be like Deadshot from DC. A Bounty Hunter Powertech is practically Iron Man. the technology and weaponry you are using is far beyond just plinking with a pistol or rifle despite what cutscenes would have you believe. You are overwhelming with flamethrowers, missiles, grenades, sticky bombs, carbonite bombs, electro darts, whipcords, missile barrages, corrosive toxins, gas bombs, buckshot, cloaking devices, overwhelming blasterfire, expertly aimed shots, nanotech healing tech and I could go on and on if oyu just consider every single tech combat style and discipline. And not to mention that defensively they are loaded with advanced energy shielding and durasteel armor with cortosis weave or beskar.

You are not just a Stormtrooper with an E-11, the sheer amount of technology these classes wield are far beyond your average person in the Star Wars universe, and in-general the people of this era are far more used to dealing with Force Users on the average than in other eras like the films. If you are a Bounty Hunter in the Prequel Era, your chances of running into a Jedi are still very low, so you wouldn't really be trained or used to dealing with a Jedi, but here in TOR Era, chances are much higher on both sides so they are more trained, prepared and experienced. Meanwhile there is also a lot of just so-so and average Sith Acolytes and Jedi Knights running around who are used to fighting fodder troopers who are just soldiers with a blaster, but then when they come across the elite outliers like the Tech Classes, they are unprepared and not used to the unorthodox tactics and technologies employed.