Absolutely, everyone has the freedom to start a business or not. And if you do, you have a choice about how to run it, what channels to use for talking/reaching

Absolutely, everyone has the freedom to start a business or not. And if you do, you have a choice about how to run it, what channels to use for talking/reaching users/customers. You could just have a phone number and not accept anything else as a support channel. The choice is entirely up to you :) Most people who run businesses opt for meeting people where they already are though.