In my opinion people who complain about having to stop and wait until the rain is gone don't understand the game. If you are too stubborn to think of another path then that's clearly on you and not the games' fault and you shouldn't complain about it because there are always either different solutions or alternate routes. Sitting there and waiting like a spoiled kid at the supermarket whose mama refused to buy candy won't get you anywhere. Of course you won't enjoy the game that way, that's not rocket science.
Okay, let's digress a little bit, shall we. Most of the times the same people complain about the weapon durability because they want to find the BESTEST and STRONGEST weapons and be able to keep those FOREVER. Why is that? Well, if you ask me, that's because some people don't like to deal with uncertainty. They always want to deal the most amount of damage so that the mean baddies are gone quickly and without much harm so these people can keep walking through the park without having to fear much challenge and threats. Uncertainty about having the best equipment in order to be prepared for anything that may ever cross your character, no matter how improbable, is a sign of weakness in my eyes. Hate me, I don't mind.
To think about how you approach certain enemies is much more engaging than just hit it with your strongest weapon and be good (aka almost any rpg). And to think about how you reach a desired location is also an essential part of the game. This is not a game about finding the quickest route, it's about exploration and adaptation. Again, if you can't adapt to new situations when the game gives you tons of opportunities, it's on you.
Also nitpicking about the rain is stupid because why stop here? Let's also complain about heat, cold and thunder, too! Let's get rid of the entire weather system because surely there is this one teeny tiny chance that you stumble in a situation where you don't have the right equipment to face one of these environmental circumstances, booooo! That's bad! Cut it altogether! Or even better! Make everything optional, right?
Weapons breaking? No, it makes me a weakling. -> optional
Cooking? Nah, hate that - optional.
Guardians? They keep lasertagging my whimpy ass -> optional.
Boss fights? I'm too afraid of challenges -> optional.
Drowning in puddles? Well, not anymore! -> optional.
Blood moon? No no no, dead enemies must stay dead -> optional.
Slipping on rocks? That's what we're even talking about, dammit! -> optional a thousand times, yo!
The entire Gerudo area? I don't like deserts -> optional.
Lynels? My whimpy ass can't handle them -> optional.
Princess Zelda? Her design in other games was nicer -> optional.
So more options are good, right? Right?! Except they rip the entire soul outta this game. So stop complaining and find your alternate route, y'all.