That is very far from the truth, and the truth was nowhere as simple as that either.

Commodore was a very serious and successful supplier of small business computers with the 8xxx and 82xx series.

The main problem was that in this segment Commodore came out of a typewriter/calculator mindset, so there were absolutely nobody who ever thought "lets connect computers together", and that set a hard upper ceiling how how large companies they could sell to.

Once a business grew, the CBM computers were replaced, not because they were unhappy with them, but because they were not big enough.

Heck, even at Commodore we used IBM S/34 internally.