@alexanderdyas @courtcan
To expand on and synthesize these posts, the Dunning-Kruger effect comes into full play here: if someone acts like they know what they're doing, they're probably just unaware of alternative possibilities (or in some cases willfully "unaware" that alternatives are viable).

Someone who really knows what they're doing typically just does it without thinking or making a big deal of it, and will a) assume everyone else also already knows a lot, and b) add caveats everywhere