In the name of Allah the Most Gracious the Most Merciful.
Firstly, phenomenons in Heaven are unlike anything here on earth that we know of. The logic in heaven is unlike any logic here on earth. So to answer your question. No, we can not assume that this is what Allah intended for us to understand because if these gardens, Allah speaks about in Quran, under which rivers flow, were only to be pleasing to people that live in dry areas, then this would contradict the whole purpose of the garden.
Therefore we can not assume this. We should take it for granted that however these rivers are, they are ultimate perfection. They are unlike any river in our wildest dreams. We can not speak of things in jannah with our limited worldly mind. The prophet(peace and blessings be upon him) told us that, there are things in Jannah that no eyes has ever seen, no ear has ever heard and no mind can comprehend. It may be, and Allah knows best, that Allah is using this simple language with us to make our peanut heads comprehend jannah, but these rivers are not as we think. And even if they are rivers of water, we wouldn't be able to imagine how something simple like water would be like in the pure gardens of jannah.
The entire awesomeness about Jannah is in such a way that even simple things like soil is extremely, unimaginably,breathtakingly pleasurable to behold. That it would take a long time for us to find it okay not to look.
For example, we all know how soil looks like and smells like and feels like when mixed with water and how it gets our hands dirty if we play in it. Now, Allah made this logic of soil on earth as we know it now. The same thing in jannah is different all together. The prophet s.a.w tells us that it is made of pure white musk. Now try to imagine a soil made of musk and gems and rubbies? It's still soil but in a pure form.
I was listening to an amazing lecture a while back about jannah and the sheikh said, may Allah rest his soul, that the palaces in jannah will be one on top of another, not beside each other, not opposite each other, one on top of the other. So on one castle is somehow suspended another. Is this even comprehensible??. He also said that the silver cups will be made of colorless silver. Now how in the world is silver colorless? Get my point. That logic we just have not reached yet.
So we accept what Allah says in the Quran that there are gardens and under these, rivers flow. We understand that these gardens and these rivers are knowledge of the unseen but we believe they are a reward for the pious, God fearing and patient. And we must accept that nothing in jannah is a joke, as i said earlier the simplest thing on earth like a headscarf is better than the world and everything in it like the prophet s.a.w said about the cloth that is on the houses head.
Jazaka lahu qeir
Allah knows best.