All of this is true, period.
It doesn't stop is though for applying this logic to everyone one else. A few here have used this to target Ambrose re India, despite the fact that he never had a chance to play there, through injury, and that he's more than proven himself in flatter conditions. Even then some said the pitches in pak wasn't flat enough when he toured.
The great Everton Weekes, many though he was not only better than the other Was, but Headley (including Bradman if I recall correctly), and was primed to perform well in Australia before a devastating injury that never quite healed. So while averaging 58 overall he averaged 24 in Australia and 33 in England. But of course he had good performances in both places, 2 50's down under and, 1 100 and 4 50's in England, but overall he failed. And he's basically called a FTB or HTB. He was a magnificent batsman but we can't overlook those "holes" as you put it.
You're saying we can't treat each individual country based on historical context, and that's true, but we aren't talking about nit picking, or looking for a gotcha moment. But if there are 3 good opposing teams and you've failed in each one, that's a concern. It's not a matter of conditions change and it's X or Y country, it's literally all of them, it's not an anomaly.
And for the record I'm not even discussing with regards to titles here, Laker has an amazing record, no one outs him the the same zone as the top 3, far less tier, and I'm saying that while no doubt a fabulous bowler and among the greats, if you're most successful I conditions when the opposing team has to also play 3 spinners, you're very conditions dependant.
It's why we look at fast bowlers record on same SC and generally away from home and against the best opposition. In everyone's record we look to see how they performed in Australia, England, SA, India and back in the day when it mattered, the Caribbean. That's how legacies are forged and it not enough to exist in an echo chamber and state that only home matters. That's never been the case for any country or player. Imran and Sunny made their marks based on how they did in the WI, Marshall in India and Pakistan, Steyn in India, Smith in India etc etc.
