As soon as you start going uphill or take a heavy pack your body will owerwhelm even the most expensive jacket.
The truth is that no matter what you wear it will always manage to get damp from sweat somehow, at least if you do any form of exercise. A light cotton t-shirt will get damp under certain circumstances. There is simply no magic bullet when it comes to clothing.
It's true that if you put on too many layers and work hard you'll sweat, if that involves hiking uphill at a fair pace then you'll likely be sweating a lot.
Few things i'd like to add from my experiences though.
Most folks hike wayyyyyyyyy to warm.
What i mean by that is, they have far too many layers for their activity levels.
Had a similar chat with a mate a couple of years back, he was moaning how his new waterproof jacket was rubbish, it was around 10c and the guy had a thick baselayer, a lightweight fleece mid-layer and his WP jacket, no wonder he was sweating.
We were hiking together and i had on a very thin baselayer on under my WP jacket and i was fine.
Second thing is, keep your jacket maintained well.
By that i mean keep it clean and keep the waterproof treatment in good condition.
If water stops beading off the jacket then it's going to soak into it, this will close the jackets pores and it won't vent as much moisture out of it.
Lastly,
If you're hiking up hill and you've sorted out your layering but are still sweating then you always have the option of slowing your pace, this can make a massive difference if you are not in a rush.
If you've sorted out both of those then a modern eVent or Neoshell jacket should allow a fair bit of sweat out.
Recently had a hike where it rained non stop from leaving my house at 02:00 till returning at 00:00.
It rained on the drive to the hike ad didn't stop for even 1 second on the entire hike.
It was around 5c and we climbed around 2000m, all i had on was a very very thin baselayer and my WP jacket.
Only part of me that was wet was my shoulders where the rucksack straps had been and the bottom of my back, to be honest though those areas would be wet with sweat even if i wore a string vest.
So it is possible for modern fabrics to work well, they don't work miracles though so they do need some help