Even in live games they use poker solvers in between breaks to optimise your playing potential and reduce the range of 'playable hands'.
Also it's laughable to suggest that playing optimally is "just the given" in MTTs, which are arguably the softest format available where almost nobody in a given field is playing anywhere close to optimal. And even more laughable to suggest that modern bots are akin to players adhering to SuperSystem, a poker strategy book written nearly 50 years ago which was already extremely outdated before the advent of solvers 10 years ago.
As for unethical, things like PioSolver, MonkerSolver, and PokerSnowie are basically de facto standard for play at high level online - and are absolutely used at breaktimes in live play. Then you have people multi-monitoring, or running GTOWizard in a VM, as a given.
You're basically claiming that all bots in action are Pluribus style, which is just nonsense. I bring up SuperSystem since its the earliest reference I can think of by a Pro to the concept of range advantage.
The modern poker sites basically just teach game theory optimal... which ends up with people running GTOWizard as a given. The best bots I've seen that avoid detection are basically doing some variant of the strategies outlined in modern guides like RIOs From the Ground Up.
