lol that's terrible, sort of like suggesting that if you're fighting someone in street fighter who knows how to block the only way you know how to attack then you just put down the controller and wait for him to get bored beating you.
The two aren't comparable. You're talking a skill-based game where you can improve your abilities. There's no "get good" that will have you overcome a slippery surface.
You can climb literally anything in the game in any weather, the game gives you tools such as the climbing gear which after 2 upgrades means the leap up walls takes little to no stamina and on top of that cooking something like an apple + endura carrot will completely refill stamina and give you extra, you can have 60 meals with you which allow you to completely refill your stam wheels which can be eaten as you climb. (that said, any of the largest mountains in the game feature snow towards their peak and never rain, at most you'll need 2x yellow stam foods to climb anything in rain)
If you're putting the controller down and waiting for the game to remove the obstacle rather than learning how to overcome it then you've missed a part of the game design.
You're suggesting I should abandon a simple obstacle that will be passable in a couple of minutes because much later in the game there is climbing gear that can be upgraded? Bearing in mind that I have no way of knowing that such climbing gear even exists?
Or spend time foraging for and cooking several stamina foods when, by the time I'm done, the rain will have stopped anyway?
But things like Endura Carrots (and other foods of this type) are found everywhere, if you go into any grass in the entire game you can do a 360 with a 1handed sword and it will likely to reveal at least one restless bug, cook 4 of those and any monster part = a potion which gives you a full stamina wheel, you can by the very start of the game have 60 of these if you want.
Then you have the suggestion that you aren't aware of there being such recipes in the game, or that you don't know that climbing gear exists in the game... that's the whole point of the game, there isn't tutorials, you come up against a giant wall and you can't see a way to climb it... you go around, you bottom feed, you avoid enemies who will kill you in the game, until you learn about things in it like the potions, gear and how to generally play. In the same frame of mind where you think to yourself "I don't know about the mechanics of the game" you shouldn't be then thinking "but I wanna be able to scale every mountain and goal in the game" in the same way going back to the fighting game scenario you see the online leader boards and think "I wanna get to the top of that mountain..... but I'm unaware of the basic game mechanics and will fail to climb that mountain."
Simple fact is, the barriers are there to be scaled and learned about in the game, if the first weapon you got that was good didn't have a point where it would break and if you could just no clip up every terrain in the game without gear/food/protection then the game would not be the highly rated title that it ended up being.
I will always say one thing about games that are considered to be great though... no matter how good the game, it's not going to be for everyone, the same goes for games that are poorly rated, some of my most enjoyable times in gaming has also been in games which rate terribly, heck Too Human is still one of my preferred X360 titles and having completed it without dying for the achievement of doing so always made me smile when I see every review complaining about how impossibly hard that game is to avoid death. Challenge doesn't mean a game is flawed, remove the challenge from any title and more people might be able to get up that mountain... but there won't be any feeling of achievement when you get to the top via escalator imo.