Levy has a price on Kane and if that price isn't met by a club then Kane stays, No matter what else happens of incoming and out goings at Tottenham they want the value of Kane. Let's be honest you can't blame them really, Kane was stupid enough to sign a 6 year contract in his peak with no buyout clause. Absolute idiot and seriously badly advised.
Don't disagree, that makes sense. But it is a reverse arguement though. Sure, if nobody meets their valuation, they won't sell.
There could be an additional consideration there though that once the price they woud accept is put forward, they would only sell if they also have a replacement. Speculation, just as much as it is that the two are unrelated.
I don't particularly subscribe to it myself, just pointing out the logic, since you asked.