This is not about employer vs employee and job security. In fact, the post mentions that there could be good reasons for layoffs. What the post highlights is -

1. Trust - When an employer tells the employee something and then ignores it - then a truth based culture gives in to cynicism. Communications in the company become suspect. Even when there are win-win situations, where cooperation could lead to positive outcomes for both management and workers, a lack of trust means the company cant execute.

Also, this will affect communications with customers and shareholders.

2. Regardless of being right, the author is helping others in similar situations, who can adjust their expectations.

3. The post isn't so much about company vs employee, but competing factions within the company, who are invested in alternative tools/proposals. Promotion is used as a means of making one's faction stronger. This need not be for the benefit of the company or customers. Lobbying will also, of course, affect truth.

Factions might be inevitable (and there can even be good reasons - people genuinely have differences of opinion). But, if the company has good leaders, they will prevent this from erupting into a strong zero-sum conflicts which drown other goals - company's profits, promoting competent people, a culture of trust.