Because I just looked at the wallet download and it states
Switch between the two currencies effortlessly.
And before anyone tries to lie, it said the exact same thing according to the wayback machine on Jan 23rd, 2018
https://web.archive.org/web/20180123072152/https://wallet.bitcoin.com/
So it always stated it supported both Cash & Core and the buy orders always took you offsite to an exchange where you had to register with the exchange and choose which coin you wanted.
Those so called lawsuits guys are some of the biggest damn idiots , I have ever seen. Everything was clearly spelled out CASH or CORE.
bitcoin.com is owned by Ver and he is using that domain to deliberately NOT clarify the position between Bitcoin and Bitcoin Cash thus creating confusion for newbies and some experienced users.