Virtually every company has a direct financial incentive to prevent negative information about them from spreading widely and to add positive information of dubious relevance.
The way Wikipedia deals with this is the policy commonly abbreviated as WP:ABOUTSELF [1], which allows to cite companies for information about themselves in the following situations.
> Self-published and questionable sources may be used as sources of information about themselves, usually in articles about themselves or their activities, without the self-published source requirement that they are established experts in the field, so long as:
>> The material is neither unduly self-serving nor an exceptional claim; >> It does not involve claims about third parties; >> It does not involve claims about events not directly related to the source; >> There is no reasonable doubt as to its authenticity; and >> The article is not based primarily on such sources.
If you want to "begin to argue with someone who holds an opinion like this", the first step is probably to clarify what the policy really is. Personally, I think this is a fair compromise between a maximalist approach (anything influenced by capitalism = bad) and the idea that companies are 100% authoritative on their own history.
[1] https://en.wikipedia.org/wiki/Wikipedia:Verifiability#Self-p...