Capacity is the issue. Undersea cables typically have terrabits per second of capacity. Newer cables are hundreds of tbps. Satellites just don't have that kind

Capacity is the issue. Undersea cables typically have terrabits per second of capacity. Newer cables are hundreds of tbps. Satellites just don't have that kind of capacity at this point. Certainly, you can aggregate several satellites, and you may get to enough capacity for your needs, but it will be a lot less capacity than a cable and you may need to have significant usage restrictions in one form or another.