Asking li for strike missions, no matter which strike missions you're planning on doing just doesn't make sense. Strike missions are supposed to be an introduction to raid and not the other way around.
It's damaging for both party.
It's either gonna continue to split the community in two between those who can do "harder" strike missions and those who can do "easier" strike missions, and as we saw with both fractals and raids, that content is just gonna be non-existent in the long run.
So no matter how much longer you take to clear Boneskinner or Whisper of Jormag with a random group, just don't ask for LI. If you also know what you're doing as a commander there is no scenario in which you can't adapt to the situation, a good team comp should make up for whatever group you have. And low damage just means you won't get gold at the end of the strike.
I can understand the frustration of how much time it might take if you don't ask for LI but, if you value your time then just go with a group full of guildies.
The latest that just got released on Tuesday with the new episode is another "easy mode" strike, and if this continue strike are gonna go back to shiver peak level.