I believe you'll find that many who would consider freedom to (more or less) equal capitalism have settled on definitions of all relevant terms that cause "freedom = capitalism" (for their definitions of both terms) to be a tautology. "Freedom", "capitalism", "coercion" and others will have been stretched in some places and narrowed in others, nuance and odd corners trimmed off until it all fits together, nice and neat, pleasing to the eye in its simplicity and certainty.