On the other hand, most of people working in the software industry hold a degree in computer science or software engineering from a university and do much more stuff than just coding webapps, at least in my country.
"Programming is one of the most difficult branches of applied mathematics; the poorer mathematicians had better remain pure mathematicians."
- Edsger Dijkstra
What I mean is, if someone is mainly focused on webapps where, in my experience, advanced math skills are not always needed what good would it do to the final product?
That isn't to say the entire profession shouldn't care, but what does it matter if we "assume software developers don't know math"? Why not just assume "That software developer must not use advanced math in his daily coding"
A lot of programmers here have to get an Engineering degree, which includes a LOT of math.
Same for CS degrees. Even Information Systems degrees (like the one I ended up getting) belong to the Engineering school and have quite a lot of math.