You assumed wrong. A receiver is for features and speakers are for sound. Audio over HDMI is a feature and all the lossless audio in the universe won’t make tiny speakers enclosed in plastic sound bigger, fuller, or clearer. You need good speakers.
The 6100 is popular because people want something they can upgrade but don’t want to spend a lot of money up front – the 6100 has a good receiver that is upgradable and has a lot of features but the speakers are shite. They then upgrade to better speakers as they can afford.