I think the point that they are trying to make is, shown by your stats, tenz has 30 first kills, 23 first deaths, chamber is a character that shown by being played well by players like yay is about getting into unexpected spots and then getting a first kill and then leaving, his purpose is not to completely frag out, which tenz's focus has been in a lot of the games in pro league, for example of a "good chamber" i would look at saya or yay because while they may not be amazing crazy aimers, they still put first kills up on the board without getting a first death, which arguably in a pro game can help more than getting 1 and dying
shown by ^, i think the point being made is that he isn't a lurky kind of player, he doesn't wait and then get a perfect flank, he entries in and uses his aim to go through their defence, how chamber is "supposed" to be played and how tenz plays it, "won't work" as well as for example someone like yay, he is more like cryo or leaf as a chamber, everyone knows leaf and cryo would be better on jett, raze, neon, etc