It seems to me that you're the one who needs to read the manga. Did sasuke absorb a Rasengan? Or did he absorb kurama's chakra. Again chakra is not ninjutsu.
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. If he could, Rasengan would've been absorbed unless you're arguing that this internal dialogue was superfluous.I'm not even sure how you concluded that Sasuke's Preta Path was different from everyone else's.