The answer from @Bohemian is correct - but not practical. You will want to change the key-binding for accessing the menu:
Type keyboard
in Spotlight
and select the Shortcuts
tab:

The one you want to change is Move focus to the menu bar
: I have chosen Ctl-;
that is much more do-able than the crazy default finger pattern

This only reduces the pain of accessing menu items. They are still v clumsy versus counterparts on Linux variants as well as windows, the defunct OS/2 etc.
This is an ongoing HUGE miss by Apple - and it shows their disdain for keyboardists and accessibility (not to mention carpal tunnel issues) - by disallowing use of the keyboard to access the many menu items in complex applications. Intellij
, Pycharm
, and friends have well over one hundred menu items: it is far out of possible to create - let alone remember - that many custom shortcuts. Apple instead doubles down on their keyboard mnemonics bashing by insisting that developers remove them - even from applications originally intended for other operating systems.
Note: I have been using Macos full time 7 days/week since 2013 - and had already run into this problem - and found it essentially unsolvable - in 2010. It is not a matter of "education" about so-called alternatives.
Cmd-?
) and just type the text of the menu item you're looking for. You can also assign custom keyboard shortcuts to menu items, either directly in Sublime Text's configuration, or (for most other programs) in System Preferences » Keyboard » Keyboard Shortcuts » Applications.