Whether something is "helpful to everyone" is a complex question that depends entirely on the context, the thing being evaluated, and the diverse needs and perspectives of individuals.

• Subjectivity: Helpfulness is subjective. What one person finds helpful, another might not. This is due to differences in knowledge, experience, skills, and personal preferences.
• Specificity: Something can be helpful in a specific situation but not in others. For example, a guide on using a particular software is helpful to someone learning that software but not to someone who already knows it.
• Accessibility: Even if something has the potential to be helpful, it needs to be accessible to everyone. This includes factors like language, cost, availability, and physical or cognitive accessibility.
• Potential for Harm: In some cases, something intended to be helpful can unintentionally cause harm or be misused.

Therefore, it's practically impossible for anything to be universally helpful to absolutely everyone, in every situation, at all times.