Why do PC/PC accesory companies have such crappy download speeds?

This is something I have wondered for ages, Microsoft, dell, Lenovo, and many, many other sites that have drivers and software have ridiculously slow download speed. I am downloading a 45mb exe from Cannon, and its going to take over three minutes, windows isos and getting drivers for fresh pc installs is even worse. Why do they all have such crappy download speeds? You’d think they could afford to give them a bit more juice.