That's why I (in the post that is being quoted by him) said that I think Riot is taking the wrong approach, They have a perfectly viable, melee carry, he can be countered, but if not he can carry just like a ranged ADC, Jax himself is not that tanky, most of the time his tankyness come from his R and good use of his E, however he is still counterable, and his laning phase pre 6 isn't all that good since he is not a lane bully like other current tops.
Even more so both Jax and Irelia have multiple sources of damage and single/team fight wide abilities that effectively control a fight as much as a support carry who just sets up the fights.
Given this also means that unlike most regular carries in which if two opposing carries improve at the same pace within relative terms then they should still be equal, jax has a very early point where this can and never will be the case without creating unfair circumstances. And while then strategy becomes all important by this point, when you have an extremely capable and tactical team (anzubu frost, tpa, clg eu *or whatever they are now*) get this champion and be equal or superior in strategy it becomes a point where must bans are toxic in for the fact it isn't because it is a players personal best (like froggens anivia) but because whichever team at that level gets it has a huger advantage than those who would even complain about who gets which side.
Creating more of these especially to match the growing meta would eventually lead to a point where almost all classes or champions don' even come close to comparison. And thats why hyper carries are either nerfed until they can no longer be so (if I recall pre remake/nerf eve was in this boat), or are fewly made and have huge trade offs (vayne/kog and a few others arguably never get as much spotlight because of there inherent cost and inability to let them play their strengths).
However the above is specifically weird for jax because he has a very small window of weakness (pre 6) and then his item hunger for power is also relatively small compared to someone like ryze who also has a faster ramp-up from someone like vayne, but is much more manageable and depends on a multiple stats to fuel his damage, versus one stat almost fueling all the damage and defense for jax with little trade off.