As a user of Google's services, it's natural to be curious about why you should be concerned about data privacy. Here are some reasons:

1. Data Profiling: Google collects data from its network of services to develop a detailed profile of you. This includes your search queries and interests, websites visited, video history, location data, emails, and more. This profile helps them to predict and influence your behavior, which can be a concern if you value your privacy.

2. Targeted Advertising: A significant part of Google's income is derived from advertising. By collecting your data, they can display hyper-targeted ads that are more likely to lead you to purchase a product or service. While this might seem beneficial, it can feel intrusive and manipulative.

3. Sharing/selling to Third parties: While Google states in its privacy policy that they do not sell your personal info, they do share your data with third-parties for reasons such as improving their services, developing new ones, and for advertising purposes.

4. Potential Data Breaches: While Google has robust security measures in place to protect user data, breaches can and do occur in the digital world. In such cases, your sensitive data could potentially be exposed to malicious parties.

5. Ethical Concerns: Some people have concerns about the sheer volume of data collected by Big Tech companies like Google, how it's stored, whether it's anonymized securely, etc. The concentration of so much data in the hands of a few entities raises questions about monopoly and power dynamics.

As in all things, it's essential to weigh the convenience and benefits Google provides with these potential downsides. Using privacy-oriented alternatives or adjusting your privacy settings can help you maintain a greater level of control over your personal data.