You gain plenty, it's just a matter of approach.
Try to have an open mind, don't assume that something which doesn't conform to your standards is instantly bad design, maybe it's there for a reason? maybe it makes more sense in the grand scheme of things.
The Witcher games have never been afraid to limit the player on purpose. Whether it's the second entry, forcing you to drink potions before battle or the third, taking away your ability to grind levels and money. They ask the player to give up on something, but return whatever you invest with interest. It's just not so apparent that you will immediately notice, this kind of design is what permeates those games.
At the very edge of White Orchard to the South West, right at the border of the playable area. There is a "herd" of nekkers, around a dozen in all, they are level 6. On the surface, they are no more dangerous than a pack of wolves, using group tactics and nabbing at your health. But a little overconfidence and you will quickly learn a terrible truth. They are smarter than wolves, attack in groups of 3 or more. Are quick to retreat and dodge around as they did in Witcher 2, they jump much further than they used to, and specifically target your back for bonus damage. They are not guarding anything, they are not near any of the "?" signs. There is not a chest of loot or a pretty sight to be seen either. And yes, you get few XP points for defeating them, so why seek them out at all? turns out, most of them will drop a mutagen, which as far as I can tell cannot be acquired anywhere else in the prologue until you defeat the Griffin. And even then you will only get one, not 6 or 7. Their blood and claws are worth a lot of coin and valuable crafting materials too.
You don't get to be the "poor" adventurer that has a purse filled with enough gold to by a city. Your pockets won't be filled with enough loot to equip an army. You don't get to permanently remove all the monster infestation on the continent. You don't save humanity (or.. non-humanity?) but that's not a bad thing. Learn to work around your limitations and you will find a kind of fun that's impossible to find in Skyrim. The kind of fun that comes from genuinely needing to kill a pack of monsters, and not because the game designer told you to do so.