"Big Tech" had not been assembled yet. Microsoft was the only tech megacorp in town, and they were _hated_ back then. Apple was still recovering from shambles. Google was a startup nobody heard of. Facebook wasn't a thing yet.
Tech investment money wasn't on the same scale as today. Money was measured in millions instead of the billions today. Most of the money I think was still towards finance at the time. If you look at the public companies with largest market cap before 2010 ( https://en.wikipedia.org/wiki/List_of_public_corporations_by... ), you'll see there's quite a couple banks on the list.
You're absolutely correct though that this trend was foreseeable in the 1990s. Which is kinda why the dot-com boom/bust happened -- everyone knew it was the future, I guess people were just a bit too excited for the future, and the companies who'd actually create that future weren't even founded yet, leading to all the mis-investment and subsequent bust.