Problem is, if the bolts are threadlocked, then
a) you can’t judge how tight they are, even a loose bolt won’t tighten unless the torque is high.
b) if you break the threadlock, then even the re-useable stuff is never quite as strong again.
I still check most stuff though, usually the adjustable bits like headset, brake calipers etc, and bar angle, stem height etc is tweaked anyway.
In the closed thread, the OP could probably have learnt how to adjust his/her gears quicker than that thread took to escalate! The bike’s been halfway across Europe in a couriers lorry, the odds of the gears working first time is astronomically small! You’d think in 2 years cycling they’d either have learnt how to adjust gears, or at least know they go out of adjustment and need tuning.