Similarly, Chakotay and Janeway were being developed to be a couple for years but trek doesn't like captains in committed relationships.

Think about it. In DS9, trek KILLED Sisko's wife, not just once but twice if you count the mirror universe version.
Then they gave him Kassidy, but put her in jail.
Then she got out of jail and (?) married him... so they elevated him to wormhole prophet to escape domestic blissdom.

The episode where the 2 were facing being stranded alone in a planet showed the attraction plainly.

Oh. My. GAWD. Yes!
With apologies to shatnerage... Janeway DID give up trying to escape the planet when there was no other choice after the storm, and its safe to say she was LOOKING FORWARD to bathing in the "river" on their boating trip...

