This is mostly true for services companies (TCS, Infosys, etc). A lot of restrictions are there because clients demand it. It is borne out of fear of data breach. So these companies goes few steps ahead and impose blanket ban of lot of things e.g can't plug USB devices to company provided laptops, No permissions to install anything (except whitelisted software).
On the other hand, new age product companies/startups are similar to Silicon Valley.