Because that was never the goal. Investors are taking more risks because they have to in order to find return in a world where the interest rate was basically zero for 8 years.

The interest rate affects everybody, which allowed troubled banks to lend cheaply to each other in the wake of the financial crisis (good) but also means that low-risk investments generate very little return (bad). It’s the later that has pushed investors into riskier assets - whether or not that’s beneficial depends upon how much systemic risk there now is... which is not obvious, after all mortgage-backed securities were supposed to be safe but we all know how that worked out.

The treasury would like to raise interest rates but this means that consumer debt will cost more each month and is painful for homeowners especially. So it’s a slow process. We may already have trapped ourselves in unstainably cheap consumer debt - much like those 2005-vintage mortgage “teaser rates”.

As I understand it, QE (and monetary policy more broadly) juices the supply side of the price curve, leading to a general rise in prices due to the increased supply of the metric we use to measure prices (i.e. dollars).

So it's likely QE has led to a general devaluing of the dollar that would lead upward pressure on all prices. The reason the three industries you mentioned have outpaced every other seems to be federal policies like subsidies and regulation juicing the demand side of the curve.

It also seems like those three industries are fairly insulated from globalization and, to an extent, automation, which accounts for a lot of the downwards pressure on prices, offsetting some of the devaluing effects of QE.