Sometimes I really wish this site had a facepalm emoji in the "Like" options.Well, Kyle does think "a rogue" is a front line melee striker. He sees "rogue" as a "free spirit" in the most "Disney" sort of way. He is fine with mass slaughter, but thinks "stealing" is bad. Even if in a game with more "theivery" abilities for his character, he simply would not use them....after all, he does not do so in 5E.
And he has the huge shadow of Modern Sensibilities. His idea of robbing a bank is to attack the bank, slaughter all there and then loot. He would not even consider doing anything that was not combat. And he is fine stealing from big banks or 'evil' companies, but has a problem with stealing from "people".
I doubt few modern gamers would like your use a "Thief Class" in 5E: both DMs and Players. They would just skip it.