You are of the opinion that the pokemon are what break Drizzle, as you find it manageable without them.
I am of the opinion that Drizzle is what makes the pokemon broken, as I find them manageable without it (and they were before Drizzle Politoed was released). Thus I would not vote to ban the genies or Starmie, I would vote to ban Drizzle.
All of the arguments presented, mine and yours, are rehashes of Round 2 and come down to the community's preference overall.
Yes, other weathers can be used to check Drizzle, and they are. They do, however, have their own draws and can be quite powerful if Drizzle weren't around. Look at Little Cup, for example. There is no Drizzle in that metagame, but Drought still gets used of its own merit alone. Different metagame, yes, but the principle is the same. I doubt people would stop using Sand or Sun just because they don't need to check Drizzle anymore.
And yeah those pokemon aren't viable outside of a Drizzle metagame. But there are also pokemon that aren't used solely because they can't survive in a weather based metagame. Usage will fluctuate with all changes, naturally, so saying that cutting Drizzle will reduce diversity without taking into account the rise of pokemon who benefit from the lack of permanent rain is completely disregarding the other half of the argument.
Stealth Rock is beneficial in essentially all cases, though it affects different groups of pokemon in different ways, diluting the effect. Drizzle has a much more concentrated effect on a smaller group of pokemon, yes, but those pokemon become extremely potent when they would otherwise not be, and I believe that is why Drizzle needs to go.
Again, there are those who will say that Drizzle is not broken without the pokemon, and there are those who will say the pokemon are not broken without Drizzle. It all comes down to preference, IMO.
