People are clamoring around you in a huge chorus of it's fine just roll with it but frankly, I think your point of view is totally valid. While Larian did a great job making every path a valid way to the ending, you can really only ever lock yourself out of content with your choices.
Go too far down one of two branching paths? Hope you can pass a big fat skill check or two, or that one companion will bail. Hope you didn't like that character or want to see more of that content. (Oh, and if you do pass the skill checks, 10 minutes later the companion is like "ugh no it's fine you were right, forget I ever wanted to go that way even though I've been obsessed with it for the last 20 hours" in the name of railroading the character back in line.)
Get interested in the wrong quest too early? Hope you didn't want to finish the main side objective in that one area. No no, even though all the characters are still present, you don't get to finish it. Because we said so. Shoo along to the next place. Go. Get.
And here's hoping you don't get curious about the "evil" path - you lose multiple companions and a whole-ass cast of side characters that are meant to follow you through the game and gain one (1) bit of interesting new content to replace them. Is it still interesting? Absolutely, but it's a consolation prize compared to how much you lose.
It took me 3 playthroughs or so before I finally felt like I was on a save where I was having a good 80%+ of the intended experience. And yeah, you can replay it for what you missed, but not everyone has time for that, especially in a game this immense. I know I've started it up to make my fourth character about half a dozen times and Alt-F4ed during character creation as soon as I think about going through the parts I've thoroughly combed already.
BG3 is my GOTY by a long shot, but people should have more sympathy for this outlook. There are definitely right paths and wrong paths, and while they all lead to the end, the wrong paths have a lot less to look at and a healthy amount of rubbing your face in the fact that you did stuff in the wrong order ("Perhaps you could have...." ok thanks, narrator).