I wonder if it was intended for this puzzle to be solved this way.
Great for speedrunners I guess.

This should be the room right after the big speech, before the boss fight takes place.

I don't see why not. It's a Metroidvania and sequence breaking has always been a bit of a staple (intended or not) of the genre. Especially with games like Super Metroid, there were abilities that were never directly explained to you that you start with or gain as a side benefit to other power-ups, and they would allow you to sequence break through big sections of the game.

While that ability isn't really hidden, it's kind of the player's fault if they forgot about it.