that definitely sounds like a whinge. raspi is fundamentally an unfinished, everything-not-included product. most use cases require some sort of dongle, hat or other adapter. an audio jack (especially in a context where you're not using an HDMI device that you can get the audio from) is much more niche than a lot of other things that aren't included on-board, like storage or POE.

if it's a trade between a built-in audio jack or a built-in RTC, i'll take the RTC 100% of the time.