Since they didn't get trapped in the barrow downs (and subsequently saved by Tom) they didn't find the barrow swords, specifically enchanted to be effective against the which witch King.
When merry stabs the which witch king therefore nothing should happen.
Why didn't just Tom wear the Ring as he makes passionate love with his wife, so he can force Sauron to watch.
Sauron, who is a virgin, who never had a gf and was dismembered and reduced to a giant eye by a fucking human would realize he is nothing compared to Tom, whose girth is beyond even Eru Ilúvatar's comprehension.
Wishing to die but unable to kill himself as he doesn't even have a fucking hand to pull the trigger, he would order his orc armies to piss on him, so that the flames of his eye can be extinguished and his mind can be set free of Tom's all encompassing girth. His spirit would be released to the boundless void that ripples and contorts with Tom's mighty thrusts and he would find no solace.
Edit: When Tom thrusts his final thrust and shoots a billion Bombadillos deep into Goldberry's loins, the impact would shatter Sauron's soul into a billion Saurodillos and he would be free. When this happens, not even the wisest can tell.
I read the books twice. I will never get those hours slogging through Toms chapters back and he was entirely irrelevant to the plot.
It was like a fever dream that could have been written off as a mass hallucination of the hobbits after Merry and Pippin share some weed they stole from Gandalf.
Me reading all of Bran's chapters in ASOIAF. On rereads I literally just skip his chapters it's so liberating. I just pretend he died when Jamie pushed him out of the tower and the story plays put exactly the same. (Also I haven't watched the show yet no spoilers pls)
When you watch the show, stop after season 5 and pretend it was cancelled. You will be much happier in life this way. And skip the commentary halfway through season 5 as well...
I will never get those hours slogging through Toms chapters back
And they're so near the start of the book too, before anything really interesting happens. I nearly stopped reading there. (I didn't stop only because I had enjoyed The Hobbit so much.)
Hey! Come merry dol! derry dol! My darling!
Light goes the weather-wind and the feathered starling.
Down along under Hill, shining in the sunlight,
Waiting on the doorstep for the cold starlight,
There my pretty lady is, River-woman's daughter,
Slender as the willow-wand, clearer than the water.
Old Tom Bombadil water-lilies bringing
Comes hopping home again. Can you hear him singing?
Hey! Come merry dol! Derry dol! and merry-o,
Goldberry, Goldberry, merry yellow berry-o!
Poor old Willow-man, you tuck your roots away!
Tom's in a hurry now. Evening will follow day.
Tom's going home again water-lilies bringing.
Hey! Come derry dol! Can you hear me singing?
No, his purpose was to show there was a wider world and a deeper history to Middle-Earth than we got to see in the books. Tolkien was dropping hints like that all over the story; Tom was just the biggest one.
It also was the way Merry got his special wraith-killing sword, and it gave a bit of a glimpse into the limitations of the powers of the ring, foreshadowing Sam’s ability to give it up freely.