Yes, you can lose other companions too, but only as a reaction to your actions - they never demand that you act a specific way upfront.
Gale demands you give him magic items to eat upfront.
Astarion demands you let him talk to Raphael upfront. (He also demands you let him drink your blood. He will demand that you never force him to drink blood again if you pusuade him to drink Araj Oblodra's blood Heck, upon first meeting him he demands you answer his questions with a knife to your throat...)
Wyll tells you to not confront Mizora (He won't leave if you do. Which is why he's a boring character, he has no spine to actually do anything most of the time)
Karlach will tell you upfront not to attack the grove.
Meanwhile, Shadowheart only tells you to let her do the Shar trials... Which you can completely ignore and she doesn't care one whit.
Lae'zel has a few moments of telling you to act a certain way, like going to the creche, being respectful to Vlaakith and saving Orpheus... But this is on brand for an indoctrinated Gith.
You're really jumping through hoops trying to portray Shadowheart and Lae'zel as far worse than they actually are, due to you attributing to them actions of completely different people that you know/knew in real life for some inexplicable reason.
Or rather now you're apparently just hating on the VA's for Shadowheart and Lae'zel while glazing the fan VA's for modded female genderswaps...
