I don't think more rhythmically complex automatically equals more rhythmically advanced. and rhythmically complex definitely doesn't equal better (i.e. Klaus Dinger only played one 4/4 rock beat and he is still one of the greatest, most innovate, rhythmically advanced motherfuckers ever to walk to face of the earth!)
and the literally THOUSANDS of African music traditions are not simply "more complex", they are in every way more advanced and evolved.
more advanced because:
We are talking about cultures which have been perfecting ways to maximize the dance through sound, studying how rhythms affect the body, its vibrations, the intellect, the emotions, and designing specific instruments for every expressive, social purpose, for longer than all of the oldest civilizations on Earth.
and i have also time and again said there are advantages to the North American simple and brutal 1 - 2 --- for one (maybe the only one though lol) it delivers a forceful punch in the gut you won't walk away from so soon afterwards.
also, this American "dupple" 1-2 pattern, with the snare on every 2, and nothing in between except an offbeat constant hi-hat, this rigid and mechanical monotonous rhythm may simply be much more suited to our rigid, mechanical, and monotonous lives in big cities.
and it has a resoluteness which i like, without the upbeat on the 3.5 or 3.4 to roll the rhythm to the next bar in a continuous flow of energy, the BOOM-KA, and that's it, finality forms a mini stoppage, a break in the flow, after every single snare. and this of course delivers a unique set of possibilities.
North American pop/dance music is dominated by this 1 (one, meaning not 2, not 3, but one, single) style of rhythm.
the continent of Africa has literally THOUSANDS.
what about all the other time signatures, each comprising entire lineages of music making?
just off the top, dig this sick sick beat from Nubia:
what is that, 5/8?
and check this wicked, wicked Apala music from Nigeria (the entire album streams here)
what time signature is that? i got nuttin.
you know those Food Festivals in Mexico where you go and taste hundreds of different kinds of cousines and flavors and styles and traditions?
compare that to McDonalds.
(except African music styles is much more diverse in its multitude than Mexican food styles)
hey i like a burger and fries once in a while too but do you see what i'm getting at?