What exactly is the conflict between PDF requirements and load speed?

PDF requirements often include high display quality, completeness of information, support for complex layouts and fonts, which leads to a large file size. This increases loading time, especially with slow internet or limited resources. Thus, a conflict arises between the desire to obtain a detailed and high-quality PDF and the need to ensure fast loading and system responsiveness. To address this issue, compromises are often made: optimizing images, using compression, simplifying the document structure, or loading the PDF in parts.