Wasim had a much longer career career, much worse fielding support and much tougher home decks so the statistical gap between them is pretty much entirely down to those things. Wasim was picked as a teen and had to learn on the job, something people consider for Tendulkar but not him. And still put in some epic performances against that ATG WI team. Akram played for 5 more years than Ambrose which is pretty substantial.
I'll give you two of the three, though tbh, taking you views into account should only be one.
Yes Wasim did play longer, and it seems he and Ponting both seem to be always penalized for that. In a post further in you mention comparing the career lengths of the two men and comparing from that perspective. Though that one isn't 100% fair either (because that also includes Curly's slow start and him slowing down), it's more accurate than looking at it unfiltered.
With regards to fielding support, for bowlers like Hadlee, Lillee, Steyn and McGrath, I have no doubt the fielding support may have been worth at least one average point over their careers, who knows, possibly more. But for Wasim there is possibly two counter points. One he attacked the stumps more, but that may also have been because he knew he didn't have the catching support, and two you don't believe it should even be factored into the selection process, at least not above a certain base level of competence. Just to note that the Chappells, Mark Waugh, Ponting, Hayden, Kallis to name a few were considerably above the mean and we're just special. Marshall and co had Lloyd and Richardson, success isn't a coincidence. So long way to say, that yes, he would have been well served by better catching support.
I cannot agree with the third point though, though I'm sure you'll (hopefully cordially) dispute it. Yes, it's always stated that Pakistan had less helpful home pitches, but Wasim and Imran consistently averaged less at home than away, even during the respective peaks (especially for Imran). So while you may state that it was because they adapted to them, it then can't be seen as a negative. But that's just my opinion.
But yes, two of the three are valid points. But if you were in charge, would you have done anything about the second one.