Bedrockgames
I post in the voice of Christopher Walken
Yes that is how it works.
A - "Everything" is GM decides
B - Not really I use tables
A - Yes but you created those tables therefore GM decides.
B - These tables are extensive, 2 pages deep
The point about tables is because you are putting disparate elements on them and rolling randomly, it isn't like the GM engineering a scenario. It tends to produce unexpected results and things the GM has to fit to that moment (and some tables require to roll on multiple tiers and combine things). Just because the GM made the initial entries, I would still say that is miles away from the GM creating a planned encounter
The problem with ' everything is GM decides' is it glosses over all the other things going on and reduces all trad play to the power of the GM. The GM's ability to provide setting response to players actions is important, but so are the player's actions. So are tables (and people can characterize these as GM decides because the GM built the tables, but that overlooks that a table is effectively a system that provides randomness in play, not something built on the GM deciding what he or she wants to happen in that moment (otherwise the GM would just choose the encounter rather than roll on the table).
Sure this happens across styles and structures, you just have to accept you will eat more prep in a sandbox because that is the arrangement you are offering.And like everything I prep doesn't always see the light of day. PCs aren't forced to engage.
And I don't force them to engage.
However because they didn't engage with my prep I will GM decides a further move which works for my Living World.
Again ofc they are not forced to engage...
I think characterizing it as a move feels off to me. But as long as what the GM is introducing is a proper reaction to what the players are trying to do, I think you are honoring their agency and you aren't just in a game where the GM is simply deciding things.