the reality itself proves you are talking bullshit...
you do realise under ion we got MORE content in open world, solo/group non raiding pve content, and pve alternative progresion paths to raids since the begining of the game, right?
WQ, legion invasions and similar events, all of argus and every zone added in patches after, visions, islands, warfronts, torghast, campaigns, mision table, pet battle dungeons, M+ was all done under Ion, who somehow is focused on raids only...
what was open world content before legion? daily quests, rares (ironicaly, very rarely) and... that was it... instanced pve? raids and that was it, scenarios briefly in MOP...
visions are btw great example of your "majority" - it was soloable content that rewarded "bis" items (highest ilvl and corrupted) how many people finished it? well according to YOUR source, 24% (25% for orgrimmar)... so much for majority...
https://www.dataforazeroth.com/colle...n-of-stormwind