None of what you wrote below even comes close to being evidence of:
As quick as they make their products, they fly off the shelves.
Not even remote close. Best selling is a comparison with other products. It doesn't mean flying off the shelves. Example: Companies A, B, & C each make 100K units of their competing products. Company A sells 33K units, company B sells 21K units, and company C sells 13K units. Company A has the best selling units. Company A's products didn't fly off the shelves, they sold more. It's not the same thing.
Even if we went with your premise, it still wouldn't hold water.
iPads are the best selling tablets.
iPad sales have been in a multi-quarter decline for some time now. Not flying off the shelves.
Apple Watches are the best selling watches, second best fitness wearable.
AW along with the entire wearables category had major decline. Not flying off the shelves.
MacBook Pros just beat all other laptops in sales.
I can't fault you for this mistake. It was MR's clickbait headline. The article you're referencing is about revenue, not unit sales per se. Based on the 5 (including the MB) laptops included in the comparison -
5 laptops, not all laptops - one could rightfully conclude the new MBP sold more units than all in the comparison, except the MB. Regardless, beating 5 laptops does not equal beating all laptops.
Funny thing, the source material for that particular article... yeah, it's actually about the low sales of the MB and the exodus of Mac laptop users. So... not the greatest evidence to use to prove your point.