Uh, yeah.
I'm puzzled that you think you need to tell me that. I'm wondering if you are at all understanding my critique of skills systems.
Well, you've brought up lockpicking quite a bit. It seems to me part of the point of a lockpick skill - as used in a traditional dungeon context - is much the same as any other open door check: it means that the players aren't guaranteed to be able to go where they want. I mean, AD&D has at least 4 versions of this: the STR-based roll to open doors, the STR-based roll to bend bars/lift gates, the thief's roll to pick a lock, and the Knock spell. It seems pretty inherent to the game that there is no guarantee of being able to get through the door you would like to get through - some of that ability to get through doors is gated behind a mix of luck (how well did I roll?) and planning (did we bring along a thief hireling? did we memorise a Knock spell?).
As a result, sometimes the players have to have their PCs take an alternative path - or try and find an alternative path.
This is why I don't see same disjunction that you are positing, between PC build including a skill (like lock-picking) and players having to make decisions about what their PCs do.
I can see that an adventure design without alternative paths aren't well-suited to this - but then to me the issue is more about the adventure design not being well-suited to an "open doors" skill, then to the existence of the "open doors" skill itself. Similarly, an adventure which only works if the PCs win a fight isn't well-suited to the use of a "fighting" skill.
Let me try this a different way...
Let's say the party is at a fork in the road, and they have divined/listened/sniffed etc., and have determined that going left leads to chocolate cake, and right leads to brussels sprouts. As it turns out, the villain is from the Elemental Plane of Chocolate, and they have learned the villain is vulnerable to vitamins. So clearly they want to go right first in order to stock up on missile weapons. BUT! ALAS! There is a LOCKED GATE in the way. WOE BE THEY!
Fortunately the Rogue has +7 in Lockpicking, so he opens the gate. Or, maybe not, because he still has a 10% chance to fail.
I really don't see how the RNG on the lock...a 10% chance they will have to think of another way to open a locked gate...adds anything interesting/worthwhile to the game.
This seems like an example of an adventure without there being meaningful alternative paths.
The lock-picking skill was invented in a different context, where there are multiple meaningful paths.
It
can survive outside that context, I think, but only if there is a willingness to adopt a different methodology from the typical D&D one (something closer to what
@SpellObjectEnthusiast called "PbtA" - which is not unique to PbtA games).