yet I believe at the level of semantics, not the best one.
Oh Go. Were I not a chess player first, I'd play the hell out of you. But that is a way of life, not just a game, this is a mastery of design that transcended time a space before games were a cultural thing. Before culture was very much a thing.
But back to what I believe: I think that is a very superficial statement about accessibility of Go. So let's define accessibility, which will be unfortunately a very lacking definition:
A required medium relative required practise/thinking time required for an increase of skill (including the first clicks).
In these regards, SC2 and BW have very, very similar accessibility. Left click to target units, right click to do. Button on the right to build or cast abilities.
To a certain degree, the things that make SC2 are not influencing strategy. Auto worker-minerals correlation, display of adequate number of workers, segmentization of screen into buildable areas, auto-cast most important unit abilities, etc.
And then, there are changes in strategy themselves, that in SC2 promote mastery of the above ones (for proper timing) and proper build orders. With deathballs playing against each other very much like paper, rock, scissors, scouting gets important, mastery of a number of build orders and timing. You can also harass via drops or certain units, but mostly drops. All other strategic concepts like map control emerge from the strategic needs stated here and are just conceptualizations making it easier to abstract in part of strategy.
And that's basically the entire depth of SC2 in nutshell.
You wish to see how accessible is Go?
You can get a baseline idea of how to click and do things in SC in under 2 minutes. Describing rules of Go, including scoring, might take slightly less.
With Go, based not just on set of rules, but underlying mathemathics, the skill curve is much, much more demanding. That's why there is handicap to help newbies against more experienced players. And how many _decades_ does it take to be pro?
In my eyes, Go really is far from accessible. Knowing how to move chess pieces on the board does not make you know how to play - chess rules can also be summed up in about 5 minutes, and barring extreme talent, you need play, and not just play, but learn openings, tempo theory, using pawns and quite a few other concepts - for years, to achieve a relatively mediocre level, based on ELO.
So what I think is true, jest, more accessible game is inherently shallow, and Go is neither accessible, not really (quite the oppossite), nor is it shallow (quite the oppossite).
In SC2 after a weekend or two or ten of playing you grab the build order and are good to go.
In BW that would just not suffice.