Because they used precious CPU cycles at a time when they were not plentiful. I went from an ISA modem to a serial one at some point my mobo lost ISA slots or had some other issue? To be honest I don't recall.
The hot shit was the Diamond Dual-Shotgun or something like that. Dual 56k modems on a single ISA card. Talk about being baller back in the day.
I forget the name of the service, but I subscribed for several years. I could dial into a local modem, then link to modems in different cities (major cities), and take control of a modem on that end. Had to use Hayes modem commands (ADTD with phone#) and could connect to a BBS in that city. Being from a town with 3 BBS's, one of them lame, this was great. This was when 9600 baud was as good as it got.The slowest modem I ever used was 110 baud. Then 300 for a long time, you could type faster as I recall. But the whole idea of remote electronic transmission of data was pretty amazing. People would rack up hundreds of dollars a month phone bills calling even 'toll areas' in the same area code BBS's.
