I cannot say whether you are being serious or just trolling, I hope the latter is the case (given the more or less exact same thread posted after the US Open as pointed out above)
But for the sake of the argument - what on earth makes this comment true?
"they (the others) are TOUGHER to win "
Why is that? The same players are playing and you need to win seven matches everywhere. If anything, AO is tougher to win as everybody (in theory) should be fresh and injury free after the offseason. And everyone can play relatively well on HC as opposed to both clay and grass.
And yes, the AO was less important 25 years ago. But now, it's more or less on pair with FO and US. The only one that sticks a bit out is Wimbledon as the grand price.
Finally, winning more AO's cannot hurt anyones legacy, only add to it. Diversifying your resume will add even more, but a slam is still a slam.