You urgently need to play some MM in a raiding context at higher than the 30th percentile, this is simply not even true.Now I would agree to this in the Legion Pre-Patch where talenting into Patient Sniper (Which then made Vulnerable only last for 6 seconds) gave you SOME of that finesse as making sure to hold Vulnerable up as much as possible while slotting in Aimed Shots was the only challenge a MM had - And it was fine, until Legion launched and Windburst essentially filled in those last few seconds where Vulnerable otherwise would be down while Sidewinders kept cropping down your toolkit, making 2 buttons work as 1 to the pleasure of all MM Hunters.
Atm there is little MM can do to in any way, shape or form screw up, as mentioned - When you get some decent gear, the set bonuses and some leggos, focus management becomes non-existent and to have close to permanent up-time on Vulnerable is not even something you need to think about anymore. MM HAD that finesse but it is all but gone now, making the spec just as easy if not easier than BM with little to no in-the-moment decisions that currently would affect them.