That's the core of the problem. Eberron accomplishes that through stuff PCs gain and learn
through play. 5e accomplishes it through
existing as a pc. That doesn't leave room for the
through play part.
The 5.24 books are still only at two of the three and those two have only been out a couple months now. Are you seriously claiming to have run campaigns in 5.24 that ran level 1 up into tier 4 &tier 5? Do you run d&d as a full time job for that group of 40 hours a week players?... That's probably not even in the same universe as normal play for a group. Between death saves, healing word and similar, like
bonus action healers kits.
The one true way proof is literally your own posts resisting the idea that there should be mechanical support that the GM can simply point at while saying "we are using those sidebars" or similar. That fact is underscored by the fact that you weren't the only poster to start down this path of attempting to ensure no other play style is even supported with the option of printed rules. Unfortunately wotc themselves spent much of the last decade encouraging that idea.