I think we need to clearly establish healing fatal wounds as something only a dyad can do to each other. That will stop the audience from asking why no ever used that power whenever someone died. It’s only possible in those rare circumstances.
Force healing as a whole, though, gels quite well with the rest of the Saga. Perhaps Sidious healed Vader after finding him on Mustafarian shores. It even solves two plot holes with one stone in ANH, one of which I didn’t even realize was there. Why didn’t the Tusken Raiders kill Luke? Why did Obi-Wan sacrifice himself? Well the Tuskens did kill him, and Obi-Wan brought him back to life by sacrificing himself, though through his training he was able to maintain his physical form long enough to face Vader. But I’m getting off-topic here.