Why didn't love save us from the imperial fleet? Why is it good for holdo to sacrifice herself but not fenn?
And every situation the characters find themselves in is the result of them being incomprehensibly stupid or making decision that literally make no sense. It feels like the movie was written once and never discussed by anyone at any point before shooting and editing.
Why is that any less likely to work than the light speed trick? The light speed trick should never have worked because if that sort of tactic did work space warfare would have already evolved around it since light speed was invented
The movie is a twisted mess and literally everything that happens is a rabbit hole of nonsense we could spend hours on
Your fixation on "love" makes no sense at all (even if she clearly has feelings for him). Rose didn't save Finn because she loves him. She saved him because he was literally going to kill himself for no reason and because they're stronger together, without trying to go out on a suicide run, against the wishes of others, against the command and agreement of the rest of the resistance. Holdo's wasn't defying the resistance, and it wasn't to do a suicide run. She talked to and agreed with Leia that staying behind was the best move so that the FO didn't get suspicious when it seemed like no one was piloting the cruiser.
Finn's decision however.. he made the same mistake Poe did in thinking he could be a hero without working together and deciding to defy the command/wishes of his friends and the resistance. It was clear his suicide mission would be fruitless. Poe and Rose were pleading with him to just have patience and learn to follow, especially when it was clear that everybody had made the decision to regroup and come up with another plan.
Holdo didn't stay behind to do a suicide run. Her plan was to stay behind so that everyone else could escape. For all she knew the cruiser would have been boarded and she could have been captured/taken prisoner.
She only attempted the light speed maneuver when it was clear that Poe had fucked up the plan once DJ turned over intel that would have doomed the resistance's escape plan.
So, Holdo's decision was different because it was either:
A. Watch her friends get murdered before she either was killed or boarded
B. Try to do something to save them
Opposed to Finn breaking off on his own, against everyone's wishes and doing something that was going to fail, when he could have easily just listened and retreated with everyone else.