Completely agree! Especially for people who are sharing inboxes and have rules to sort mail into different folders, the things I want to use are so far down the page, it is very frustrating.

It seems like it wouldn't be hard to implement a toggle in preferences for this sort of thing. I have no use for views, meanwhile archive, spam, trash, and most especially 'all mail' are hidden under a dropdown. Why insist that these options I'm never going to use take precedence over ones I use regularly, and more importantly, why not give people the option to set it up the way they feel comfortable?

One step closer to ditch proton totally - what are they doing there? Are they indians, all of them?

I have the same concern and would really like to place the categories in the Proton Mail client above the folders.

I'm in the same boat, several unused categories push out of sight what I use daily with no way to remove or at least move them out of prime real estate.

Sub-request: Even if the sub categories list by the OP can't yet be hidden in default view, it would make the interface a lot more consistent if the newly populated 'Views' menu would open in default collapsed view.
NOTE: the default opening state in the protonmail Ubuntu 20.04 Electron application is with that 'Views'
view collapsed. So it's likely that there is a toggle already there for the default collapsed view.

As it stands, because I rely on the same management as the OP of the default opening state for these busy LH categories, the expanded 'Views' heading pushes the Labels I rely on for a quick grasp of the current state of the mailbox down out of sight.
I'm not interested in any automated management of mailing lists, and much prefer this kind of development to be done without intruding on my use of the very smooth, schmick web interface.
Thanks for the opportunity to add my voice to these other clients.