The purpose of a PDF is not security, obfuscation, etc. If you NEED to manipulate a PDF, then sure, it is technically possible to do so. But it takes knowledge and effort to do so. As you say, it’s cumbersome, tedious, and counterintuitive. The primary purpose of a PDF is to be a read-only document that looks the same regardless of the screen resolution, the fonts that are installed, etc. On the other hand, Word/Excel documents are designed to be as simple as possible for anybody to edit as needed at any point, with the downside of being affected by things like screen size, fonts installed, etc.
The purpose of a PDF is not security, obfuscation, etc. If you NEED to manipulate a PDF, then sure, it is technically possible to do so. But it takes knowledge and effort to do so. As you say, it’s cumbersome, tedious, and counterintuitive. The primary purpose of a PDF is to be a read-only document that looks the same regardless of the screen resolution, the fonts that are installed, etc. On the other hand, Word/Excel documents are designed to be as simple as possible for anybody to edit as needed at any point, with the downside of being affected by things like screen size, fonts installed, etc.