I host a lot of PI missions, and many tankers cause me stomach ache.
They run ahead, which is fine, but after the initial minions are cleared, they leave the tougher enemies behind.
Fortunata Mistress, Mu Guardians, Spider Queens. All left for the team to deal with while the tanker moves on to the next mob. By the time the team catches up, the tanker is already tanking somewhere new, often far ahead and out of reach.
This creates issues, especially for Kinetics. Instead of being able to use Fulcrum Shift on a large mob, they are left facing a handful of bosses, and the team cannot unfold its full potential.
I also often invite low- and mid-level players because I know how hard it can be to find a team. But many enemies in PI missions, especially the Council, revive or transform before dying. These are a much greater threat to lower levels. And when the tanker is off soloing far away, they are not around to peel enemies off their teammates. That is literally the point of the role.
This kind of play is rare among scrappers or brutes. Some tankers behave in missions as if they are farming, pulling groups beyond cap.
The best tankers I have seen are the ones who stay close and know who is in trouble.
If you want to be the tanker that is remembered, be the one who is there when it counts.
So please do not run off and solo in someone else's game just because the game has gifted you toughness and you can.