"Vibe positioning" is the failure mode that results from having no disciplined positioning process: without one, positioning decisions collapse into competing, unresolved opinions between marketing and product — and marketing/product never wins that argument, since neither has standing authority to settle it alone.
The antidote is treating positioning as a systematic, evidence-driven practice rather than an opinion contest: see Systematic Customer-Intelligence Practices for Positioning for the standing mechanisms (customer advisory boards, quarterly executive sponsorship calls, sales as an early-warning channel) that ground positioning decisions in customer reality instead of internal vibes.