Also, given such a limited context, it makes little sense to me to extrapolate in the way you have. I haven't seen any solid stats on professionals or demanding workflows as a % of the userbase or potential userbase if Apple catered more towards other professionals in the same way they do creatives. I'd wager the number is higher than 30%.
So which other professional groups uses the Mac for resource intensive tasks and which don't use any of the type of software I listed in the millions to make any difference?
CAD? No, the software is quite limited on the Mac
Data analytics? No, the software is quite limited
Scientist? Yes, in some sciences in some countries, but a lot of them would also run development tools and would be covered in those 30%.
I wouldn't be surprised if the number of people running resource intensive tasks on a Mac is even lower. A lot of business users have adopted the Mac in the last 8-9 years and they very seldom run intensive tasks locally.