I think that comes from having lots of experience with earlier editions and non-D&D games. 5E is popular, granted. But other games, even older editions of D&D, do all the same things only better. Of the things 5E does it isn’t the best for any of them. Monster fighting? 4E did it way better. Story-gaming? Actual story-games do it infinitely better. Dungeon crawling? Hexcrawls? Sandboxing? Exploration? 5E has almost zero or literally zero support for any of those, so any TSR edition and almost the whole of the OSR does all of those better.
That's a shifting baseline. You could do a lot more with less than half the word count.
That's awesome. Playing D&D together was a main bonding experience between me and my brothers. We've since all had kids and have introduced them all to the hobby and play as an extended family. That you used 5E isn't what caused that though. Any game you regularly pushed to play would have done the same.
About half of the next generation of our gaming group started with 4E and they picked it up just as fast as the other half picked up 5E. The core of the game is the same.