With the current Fractal system, the only gates to Tier 4 are
1. Personal fractal level (which can be circumvented by forming a party with a friend who has a higher level and then leeching into LFG)
2. Agony resist totaling to a required maximum 150 AR for all Tier 4 content.
You used to have to learn the fractal from lower tiers as you progressed because agony was such a tedious task to build up and you had to grind lower tiers multiple days at least and, in the process, learn and re-learn the fractal mechanics. You had to get better at them through repetition. Now anyone who farms Istan or other gold farms in open world PVE has a free pass to Tier 4 fractals.
There have been multiple threads about fractal veterans moving unto CMs + T4s groups and also player-based gating like unstable cosmic essence kill-proof, which unfortunately can be faked as well, but that is not the focal point of this thread.
A year on into Shattered Observatory and Twilight Oasis and T4 LFG is still rife with '@ Arkk' and '@ Amala' on those select days when they are dailies.
I have joined regular T4 parties that had people who were on 'dps' classes who had over 200 AR without any form of fractal attunement title (Savant/God) and they also consumed anguished tears of Alba. Which means they had 185 AR on a class and still used a +15 agony resist potion.
I know AR converts to precision using offensive potion, toughness using defensive potion and concentration using mobility potion but having over 200 AR without the aid of any fractal attunement suggests to me they are overloading on agony resist and have no idea what they are doing.
I enjoy pugging regular T4 fractals for the most part, because there are still enough competent players in there that don't exclusively do CMs & T4s.
But meeting 1 or 2 of these really bad groups is enough to ruin an evening of gaming, primarily because said evening is stuck in T4 fractals.
The unstable cosmic essence kill-proof requirement separates the uber from the regulars in T4, but what is there to separate the regulars from the bads?
Additional Edit: The above come off as a one-sided rant (which it certainly fulfills the requirements for!), but on the flip side if you don't gate the content that people are unable to handle they will continue failing at it.
I am looking at this issue both ways: I cannot imagine it being fun for them to spend hours upon hours on a single simple T4 fractal boss, especially since they could better acclimatize at lower tiers but are unwilling to due to reward/time invested for T4 supercedes T3 and the lower tiers facilitated by ease of access. Which ironically is defeated by the fact that they are wasting time wiping on a boss they are not prepared for. And the ones able to do the content but choose to pug due to personal reasons risk getting a similarly bad experience when they run into them.